##############################################################################
###                                                                        ###
###           Full Paper (Acta Crystallographica Section C)                ###
###                                                                        ###
##############################################################################
#                                                                            #
# This CIF contains the data in a paper accepted for publication in Acta     #
# Crystallographica Section C. It conforms to the editorial and technical    #
# requirements of Notes for Authors for Section C, and has been peer         #
# reviewed under the auspices of the IUCr Commission on Journals.            #
#                                                                            #
# Full details of the Crystallographic Information File format               #
# are given in the paper "The Crystallographic Information File (CIF):       #
# a New Standard Archive File for Crystallography" by S. R. Hall, F. H.      #
# Allen and I. D. Brown [Acta Cryst. (1991), A47, 655-685].                  #
#                                                                            #
# The current version of the core CIF dictionary is obtainable from          #
# ftp://ftp.iucr.org/pub/cif_core.dic. The current version number is 2.1.    #
#                                                                            #
# Software is freely available for graphical display of the structure(s) in  #
# this CIF.  For information consult the CIF home page http://www.iucr.org/  #
# cif/home.html                                                              #
#                                                                            #
#            Copyright International Union of Crystallography                #
#                                                                            #
##############################################################################
data_I
_audit_creation_method     SHELXL-97
_chemical_name_systematic
;
 13,13a-Dihydro-9-methyl-13-methoxy-1-benzopyrano[4,3-i]-
 dinaphtho[2,1-c;1',2'-f]-2,8-dioxabicyclo[3,3,1]nonane
;
_chemical_name_common     ?
_chemical_formula_moiety     'C32 H24 O4'
_chemical_formula_sum     'C32 H24 O4'
_chemical_formula_weight     472.51
_chemical_melting_point     248\%
_symmetry_cell_setting     triclinic
_symmetry_space_group_name_H-M     'P -1'
loop_
    _symmetry_equiv_pos_as_xyz
    'x, y, z'
    '-x, -y, -z'
_cell_length_a     10.191(7)
_cell_length_b     10.963(10)
_cell_length_c     12.6210(11)
_cell_angle_alpha     102.23(6)
_cell_angle_beta     114.58(3)
_cell_angle_gamma     100.64(6)
_cell_volume     1192.7(14)
_cell_formula_units_Z     2
_cell_measurement_reflns_used     25
_cell_measurement_theta_min     15
_cell_measurement_theta_max     20
_cell_measurement_temperature     293(2)
_exptl_crystal_description     irregular
_exptl_crystal_colour     colourless
_exptl_crystal_size_max      .35
_exptl_crystal_size_mid      .27
_exptl_crystal_size_min      .23
_exptl_crystal_density_diffrn     1.316
_exptl_crystal_density_meas     ?
_exptl_crystal_density_method     'not measured'
_exptl_crystal_F_000     496
_exptl_absorpt_coefficient_mu      .689
_exptl_absorpt_correction_type     none
_exptl_absorpt_process_details     ?
_exptl_absorpt_correction_T_min     ?
_exptl_absorpt_correction_T_max     ?
_exptl_special_details
;
  θ scan  width (1.2 + 1.4θ)°
;
_diffrn_ambient_temperature     293(2)
_diffrn_radiation_type     CuK\a
_diffrn_radiation_wavelength     1.54180
_diffrn_radiation_source     'fine-focus sealed tube'
_diffrn_radiation_monochromator     graphite
_diffrn_measurement_device_type     'Enraf-Nonius CAD-4'
_diffrn_measurement_method     ω-2θ
_diffrn_detector_area_resol_mean     ?
_diffrn_reflns_number     4396
_diffrn_reflns_av_R_equivalents      .0000
_diffrn_reflns_av_sigmaI/netI      .0183
_diffrn_reflns_theta_min     4.07
_diffrn_reflns_theta_max     69.95
_diffrn_reflns_theta_full     69.95
_diffrn_measured_fraction_theta_max      .970
_diffrn_measured_fraction_theta_full      .970
_diffrn_reflns_limit_h_min     -12
_diffrn_reflns_limit_h_max     11
_diffrn_reflns_limit_k_min     0
_diffrn_reflns_limit_k_max     13
_diffrn_reflns_limit_l_min     -15
_diffrn_reflns_limit_l_max     15
_diffrn_standards_number     2
_diffrn_standards_interval_count     ?
_diffrn_standards_interval_time     60
_diffrn_standards_decay_%     0.3%
_refine_special_details
;
 Refinement of F² against ALL reflections.  The weighted R-factor wR and
 goodness of fit S are based on F², conventional R-factors R are based
 on F, with F set to zero for negative F². The threshold expression of
 F² > 2sigma(F²) is used only for calculating R-factors(gt) etc. and is
 not relevant to the choice of reflections for refinement.  R-factors based
 on F² are statistically about twice as large as those based on F, and R-
 factors based on ALL data will be even larger.
;
_reflns_number_total     4396
_reflns_number_gt     3505
_reflns_threshold_expression     I>2σ(I)
_refine_ls_structure_factor_coef     Fsqd
_refine_ls_matrix_type     full
_refine_ls_R_factor_all      .0614
_refine_ls_R_factor_gt      .0504
_refine_ls_wR_factor_ref      .1514
_refine_ls_goodness_of_fit_ref     1.039
_refine_ls_restrained_S_all     1.039
_refine_ls_number_reflns     4396
_refine_ls_number_parameters     328
_refine_ls_number_restraints     0
_refine_ls_hydrogen_treatment     constr
_refine_ls_weighting_scheme     calc
_refine_ls_weighting_details
       'calc w = 1/[σ²(Fo²)+(0.0968P)²+0.1715P] where P=(Fo²+2Fc²)/3'
_refine_ls_shift/su_max      .030
_refine_ls_shift/su_mean      .001
_refine_diff_density_max      .214
_refine_diff_density_min      -.215
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 1997)'
_refine_ls_extinction_coef      .0060(19)
loop_
    _atom_type_symbol
    _atom_type_description
    _atom_type_scat_dispersion_real
    _atom_type_scat_dispersion_imag
    _atom_type_scat_source
    'C' 'C'  .0181  .0091
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
    'H' 'H'  .0000  .0000
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
    'O' 'O'  .0492  .0322
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
_computing_data_collection     'CAD-4 Software (Enraf-Nonius, 1989)'
_computing_cell_refinement     'CAD-4 Software'
_computing_data_reduction     'NRCVAX  (Gabe et al., 1989)'
_computing_structure_solution     'SHELXS86 (Sheldrick, 1985)'
_computing_structure_refinement     'SHELXL97 (Sheldrick, 1997)'
_computing_molecular_graphics     'ORTEP3 (Farrugia, 1997)'
_computing_publication_material     'SHELXL97 and PARST93 (Nardelli, 1993)'
loop_
    _atom_site_label
    _atom_site_fract_x
    _atom_site_fract_y
    _atom_site_fract_z
    _atom_site_U_iso_or_equiv
    _atom_site_adp_type
    _atom_site_calc_flag
    _atom_site_refinement_flags
    _atom_site_occupancy
    _atom_site_disorder_assembly
    _atom_site_disorder_group
    _atom_site_type_symbol
    C1  .5534(2)  .91517(18)  .67123(17)  .0516(4) Uani d . 1 . . C
    H1  .5883  .8592  .6307  .062 Uiso calc R 1 . . H
    C2  .5695(2) 1.03949(19)  .66477(19)  .0610(5) Uani d . 1 . . C
    H2  .6148 1.0665  .6197  .073 Uiso calc R 1 . . H
    C3  .5188(2) 1.12687(19)  .7250(2)  .0665(6) Uani d . 1 . . C
    H3  .5314 1.2115  .7205  .080 Uiso calc R 1 . . H
    C4  .4515(2) 1.08757(18)  .7897(2)  .0598(5) Uani d . 1 . . C
    H4  .4190 1.1463  .8300  .072 Uiso calc R 1 . . H
    C4A  .42937(19)  .95886(16)  .79740(16)  .0476(4) Uani d . 1 . . C
    C5  .3493(2)  .91408(17)  .85679(16)  .0518(4) Uani d . 1 . . C
    H5  .3207  .9731  .9009  .062 Uiso calc R 1 . . H
    C6  .3131(2)  .78666(17)  .85089(15)  .0496(4) Uani d . 1 . . C
    H6  .2537  .7572  .8852  .060 Uiso calc R 1 . . H
    C6A  .36634(19)  .69919(16)  .79228(14)  .0429(4) Uani d . 1 . . C
    C6B  .45968(18)  .74027(15)  .74465(14)  .0406(4) Uani d . 1 . . C
    C6C  .48445(18)  .87000(15)  .73863(14)  .0426(4) Uani d . 1 . . C
    O7  .31670(15)  .57111(11)  .78547(11)  .0509(3) Uani d . 1 . . O
    C7A  .3403(2)  .46687(16)  .71026(15)  .0445(4) Uani d . 1 . . C
    C7B  .1969(2)  .35453(17)  .64277(16)  .0484(4) Uani d . 1 . . C
    C8  .1518(2)  .27384(17)  .70107(18)  .0520(4) Uani d . 1 . . C
    H8  .2111  .2926  .7853  .062 Uiso calc R 1 . . H
    C9  .0222(2)  .16700(19)  .6382(2)  .0595(5) Uani d . 1 . . C
    C10  -.0663(2)  .1436(2)  .5130(2)  .0664(6) Uani d . 1 . . C
    H10  -.1549  .0731  .4689  .080 Uiso calc R 1 . . H
    C11  -.0264(2)  .2219(2)  .4528(2)  .0671(6) Uani d . 1 . . C
    H11  -.0885  .2046  .3692  .080 Uiso calc R 1 . . H
    C11A  .1061(2)  .32665(18)  .51627(17)  .0552(5) Uani d . 1 . . C
    O12  .14453(17)  .39520(13)  .44872(12)  .0667(4) Uani d . 1 . . O
    C13  .2582(2)  .52019(17)  .51599(15)  .0475(4) Uani d . 1 . . C
    H13  .2160  .5851  .5451  .057 Uiso calc R 1 . . H
    C13A  .39196(19)  .51037(16)  .62346(14)  .0436(4) Uani d . 1 . . C
    H13A  .4303  .4436  .5917  .052 Uiso calc R 1 . . H
    C13B  .52295(19)  .63722(16)  .69998(14)  .0421(4) Uani d . 1 . . C
    H13B  .5673  .6651  .6502  .050 Uiso calc R 1 . . H
    C13C  .64161(19)  .61160(16)  .80950(14)  .0421(4) Uani d . 1 . . C
    C13D  .79745(19)  .69091(16)  .87501(15)  .0443(4) Uani d . 1 . . C
    C14  .8556(2)  .79546(19)  .84275(18)  .0554(5) Uani d . 1 . . C
    H14  .7909  .8147  .7752  .066 Uiso calc R 1 . . H
    C15 1.0043(2)  .8693(2)  .9079(2)  .0621(5) Uani d . 1 . . C
    H15 1.0389  .9381  .8845  .075 Uiso calc R 1 . . H
    C16 1.1061(2)  .8433(2) 1.00995(19)  .0604(5) Uani d . 1 . . C
    H16 1.2070  .8951 1.0548  .072 Uiso calc R 1 . . H
    C17 1.0552(2)  .7416(2) 1.04213(17)  .0572(5) Uani d . 1 . . C
    H17 1.1231  .7229 1.1085  .069 Uiso calc R 1 . . H
    C17A  .9016(2)  .66299(18)  .97767(16)  .0497(4) Uani d . 1 . . C
    C18  .8483(2)  .55849(19) 1.01279(17)  .0574(5) Uani d . 1 . . C
    H18  .9156  .5405 1.0799  .069 Uiso calc R 1 . . H
    C19  .7017(2)  .48430(18)  .95103(17)  .0552(5) Uani d . 1 . . C
    H19  .6684  .4157  .9754  .066 Uiso calc R 1 . . H
    C19A  .5988(2)  .51136(16)  .84899(15)  .0463(4) Uani d . 1 . . C
    O20  .45309(14)  .42633(11)  .79345(11)  .0508(3) Uani d . 1 . . O
    O21  .30724(15)  .55631(13)  .43687(11)  .0571(4) Uani d . 1 . . O
    C22  .1957(3)  .5867(3)  .33994(19)  .0730(6) Uani d . 1 . . C
    H22A  .2398  .6193  .2935  .109 Uiso calc R 1 . . H
    H22B  .1611  .6522  .3747  .109 Uiso calc R 1 . . H
    H22C  .1116  .5089  .2867  .109 Uiso calc R 1 . . H
    C23  -.0195(3)  .0778(2)  .7027(3)  .0790(7) Uani d . 1 . . C
    H23A  .0706  .0657  .7606  .118 Uiso calc R 1 . . H
    H23B  -.0873  -.0056  .6431  .118 Uiso calc R 1 . . H
    H23C  -.0683  .1164  .7454  .118 Uiso calc R 1 . . H
_geom_special_details
;
 All esds (except the esd in the dihedral angle between two l.s. planes)
 are estimated using the full covariance matrix.  The cell esds are taken
 into account individually in the estimation of esds in distances, angles
 and torsion angles; correlations between esds in cell parameters are only
 used when they are defined by crystal symmetry.  An approximate (isotropic)
 treatment of cell esds is used for estimating esds involving l.s. planes.
;
loop_
    _geom_bond_atom_site_label_1
    _geom_bond_atom_site_label_2
    _geom_bond_site_symmetry_2
    _geom_bond_distance
    _geom_bond_publ_flag
    C1 C2 . 1.366(3) no
    C1 C6C . 1.418(2) no
    C1 H1 .  .9300 no
    C2 C3 . 1.401(3) no
    C2 H2 .  .9300 no
    C3 C4 . 1.352(3) no
    C3 H3 .  .9300 no
    C4 C4A . 1.418(3) no
    C4 H4 .  .9300 no
    C4A C5 . 1.409(3) no
    C4A C6C . 1.434(2) no
    C5 C6 . 1.355(3) no
    C5 H5 .  .9300 no
    C6 C6A . 1.409(2) no
    C6 H6 .  .9300 no
    C6A O7 . 1.373(2) no
    C6A C6B . 1.379(2) no
    C6B C6C . 1.422(3) no
    C6B C13B . 1.520(2) no
    O7 C7A . 1.448(2) no
    C7A O20 . 1.416(2) no
    C7A C7B . 1.495(3) no
    C7A C13A . 1.521(2) no
    C7B C8 . 1.394(3) no
    C7B C11A . 1.399(3) no
    C8 C9 . 1.382(3) no
    C8 H8 .  .9300 no
    C9 C10 . 1.391(3) no
    C9 C23 . 1.507(3) no
    C10 C11 . 1.371(3) no
    C10 H10 .  .9300 no
    C11 C11A . 1.386(3) no
    C11 H11 .  .9300 no
    C11A O12 . 1.373(2) no
    O12 C13 . 1.429(3) no
    C13 O21 . 1.383(2) no
    C13 C13A . 1.512(2) no
    C13 H13 .  .9800 no
    C13A C13B . 1.524(3) no
    C13A H13A .  .9800 no
    C13B C13C . 1.533(2) no
    C13B H13B .  .9800 no
    C13C C19A . 1.372(3) no
    C13C C13D . 1.434(3) no
    C13D C14 . 1.406(3) no
    C13D C17A . 1.429(2) no
    C14 C15 . 1.362(3) no
    C14 H14 .  .9300 no
    C15 C16 . 1.403(3) no
    C15 H15 .  .9300 no
    C16 C17 . 1.353(3) no
    C16 H16 .  .9300 no
    C17 C17A . 1.414(3) no
    C17 H17 .  .9300 no
    C17A C18 . 1.411(3) no
    C18 C19 . 1.347(3) no
    C18 H18 .  .9300 no
    C19 C19A . 1.414(2) no
    C19 H19 .  .9300 no
    C19A O20 . 1.382(3) no
    O21 C22 . 1.433(2) no
    C22 H22A .  .9600 no
    C22 H22B .  .9600 no
    C22 H22C .  .9600 no
    C23 H23A .  .9600 no
    C23 H23B .  .9600 no
    C23 H23C .  .9600 no
loop_
    _geom_angle_atom_site_label_1
    _geom_angle_atom_site_label_2
    _geom_angle_atom_site_label_3
    _geom_angle_site_symmetry_1
    _geom_angle_site_symmetry_3
    _geom_angle
    _geom_angle_publ_flag
    C2 C1 C6C . . 121.21(18) no
    C2 C1 H1 . . 119.4 no
    C6C C1 H1 . . 119.4 no
    C1 C2 C3 . . 121.1(2) no
    C1 C2 H2 . . 119.5 no
    C3 C2 H2 . . 119.5 no
    C4 C3 C2 . . 119.69(18) no
    C4 C3 H3 . . 120.2 no
    C2 C3 H3 . . 120.2 no
    C3 C4 C4A . . 121.55(19) no
    C3 C4 H4 . . 119.2 no
    C4A C4 H4 . . 119.2 no
    C5 C4A C4 . . 121.85(17) no
    C5 C4A C6C . . 119.05(16) no
    C4 C4A C6C . . 119.04(18) no
    C6 C5 C4A . . 121.23(16) no
    C6 C5 H5 . . 119.4 no
    C4A C5 H5 . . 119.4 no
    C5 C6 C6A . . 119.47(17) no
    C5 C6 H6 . . 120.3 no
    C6A C6 H6 . . 120.3 no
    O7 C6A C6B . . 123.19(15) no
    O7 C6A C6 . . 114.85(16) no
    C6B C6A C6 . . 121.96(16) no
    C6A C6B C6C . . 118.56(15) no
    C6A C6B C13B . . 114.89(15) no
    C6C C6B C13B . . 126.53(15) no
    C1 C6C C6B . . 123.57(16) no
    C1 C6C C4A . . 117.41(16) no
    C6B C6C C4A . . 118.92(16) no
    C6A O7 C7A . . 121.06(13) no
    O20 C7A O7 . . 105.96(14) no
    O20 C7A C7B . . 107.79(15) no
    O7 C7A C7B . . 107.91(15) no
    O20 C7A C13A . . 109.80(14) no
    O7 C7A C13A . . 112.98(14) no
    C7B C7A C13A . . 112.09(15) no
    C8 C7B C11A . . 118.47(19) no
    C8 C7B C7A . . 122.14(17) no
    C11A C7B C7A . . 119.37(17) no
    C9 C8 C7B . . 122.36(19) no
    C9 C8 H8 . . 118.8 no
    C7B C8 H8 . . 118.8 no
    C8 C9 C10 . . 117.5(2) no
    C8 C9 C23 . . 121.1(2) no
    C10 C9 C23 . . 121.4(2) no
    C11 C10 C9 . . 121.8(2) no
    C11 C10 H10 . . 119.1 no
    C9 C10 H10 . . 119.1 no
    C10 C11 C11A . . 120.2(2) no
    C10 C11 H11 . . 119.9 no
    C11A C11 H11 . . 119.9 no
    O12 C11A C11 . . 117.12(18) no
    O12 C11A C7B . . 123.13(19) no
    C11 C11A C7B . . 119.7(2) no
    C11A O12 C13 . . 116.80(15) no
    O21 C13 O12 . . 107.24(15) no
    O21 C13 C13A . . 108.34(15) no
    O12 C13 C13A . . 110.36(16) no
    O21 C13 H13 . . 110.3 no
    O12 C13 H13 . . 110.3 no
    C13A C13 H13 . . 110.3 no
    C13 C13A C7A . . 109.47(15) no
    C13 C13A C13B . . 115.12(15) no
    C7A C13A C13B . . 107.00(14) no
    C13 C13A H13A . . 108.4 no
    C7A C13A H13A . . 108.4 no
    C13B C13A H13A . . 108.4 no
    C6B C13B C13A . . 107.35(15) no
    C6B C13B C13C . . 110.42(13) no
    C13A C13B C13C . . 107.80(14) no
    C6B C13B H13B . . 110.4 no
    C13A C13B H13B . . 110.4 no
    C13C C13B H13B . . 110.4 no
    C19A C13C C13D . . 117.98(16) no
    C19A C13C C13B . . 119.76(17) no
    C13D C13C C13B . . 122.24(15) no
    C14 C13D C17A . . 117.27(18) no
    C14 C13D C13C . . 123.37(17) no
    C17A C13D C13C . . 119.35(17) no
    C15 C14 C13D . . 121.63(19) no
    C15 C14 H14 . . 119.2 no
    C13D C14 H14 . . 119.2 no
    C14 C15 C16 . . 121.1(2) no
    C14 C15 H15 . . 119.4 no
    C16 C15 H15 . . 119.4 no
    C17 C16 C15 . . 119.0(2) no
    C17 C16 H16 . . 120.5 no
    C15 C16 H16 . . 120.5 no
    C16 C17 C17A . . 121.80(19) no
    C16 C17 H17 . . 119.1 no
    C17A C17 H17 . . 119.1 no
    C18 C17A C17 . . 121.69(18) no
    C18 C17A C13D . . 119.14(18) no
    C17 C17A C13D . . 119.16(18) no
    C19 C18 C17A . . 121.30(18) no
    C19 C18 H18 . . 119.3 no
    C17A C18 H18 . . 119.3 no
    C18 C19 C19A . . 119.58(18) no
    C18 C19 H19 . . 120.2 no
    C19A C19 H19 . . 120.2 no
    C13C C19A O20 . . 124.07(16) no
    C13C C19A C19 . . 122.64(18) no
    O20 C19A C19 . . 113.29(16) no
    C19A O20 C7A . . 115.02(14) no
    C13 O21 C22 . . 113.59(15) no
    O21 C22 H22A . . 109.5 no
    O21 C22 H22B . . 109.5 no
    H22A C22 H22B . . 109.5 no
    O21 C22 H22C . . 109.5 no
    H22A C22 H22C . . 109.5 no
    H22B C22 H22C . . 109.5 no
    C9 C23 H23A . . 109.5 no
    C9 C23 H23B . . 109.5 no
    H23A C23 H23B . . 109.5 no
    C9 C23 H23C . . 109.5 no
    H23A C23 H23C . . 109.5 no
    H23B C23 H23C . . 109.5 no
loop_
    _geom_torsion_atom_site_label_1
    _geom_torsion_atom_site_label_2
    _geom_torsion_atom_site_label_3
    _geom_torsion_atom_site_label_4
    _geom_torsion_site_symmetry_1
    _geom_torsion_site_symmetry_2
    _geom_torsion_site_symmetry_3
    _geom_torsion_site_symmetry_4
    _geom_torsion
    _geom_torsion_publ_flag
    C6C C1 C2 C3 . . . .  .2(3) no
    C1 C2 C3 C4 . . . .  -.6(3) no
    C2 C3 C4 C4A . . . .  -.6(3) no
    C3 C4 C4A C5 . . . . -175.14(19) no
    C3 C4 C4A C6C . . . . 2.2(3) no
    C4 C4A C5 C6 . . . . 171.98(17) no
    C6C C4A C5 C6 . . . . -5.3(3) no
    C4A C5 C6 C6A . . . . 4.9(3) no
    C5 C6 C6A O7 . . . . -176.66(15) no
    C5 C6 C6A C6B . . . . 2.7(3) no
    O7 C6A C6B C6C . . . . 169.90(15) no
    C6 C6A C6B C6C . . . . -9.4(2) no
    O7 C6A C6B C13B . . . . -8.5(2) yes
    C6 C6A C6B C13B . . . . 172.28(15) no
    C2 C1 C6C C6B . . . . 177.56(17) no
    C2 C1 C6C C4A . . . . 1.3(3) no
    C6A C6B C6C C1 . . . . -167.59(16) no
    C13B C6B C6C C1 . . . . 10.6(3) no
    C6A C6B C6C C4A . . . . 8.6(2) no
    C13B C6B C6C C4A . . . . -173.26(14) no
    C5 C4A C6C C1 . . . . 174.90(16) no
    C4 C4A C6C C1 . . . . -2.5(2) no
    C5 C4A C6C C6B . . . . -1.5(2) no
    C4 C4A C6C C6B . . . . -178.88(15) no
    C6B C6A O7 C7A . . . . -9.9(2) yes
    C6 C6A O7 C7A . . . . 169.42(14) no
    C6A O7 C7A O20 . . . . 108.17(17) no
    C6A O7 C7A C7B . . . . -136.59(15) no
    C6A O7 C7A C13A . . . . -12.1(2) yes
    O20 C7A C7B C8 . . . . 39.7(2) no
    O7 C7A C7B C8 . . . . -74.28(19) no
    C13A C7A C7B C8 . . . . 160.69(15) no
    O20 C7A C7B C11A . . . . -138.60(16) no
    O7 C7A C7B C11A . . . . 107.37(18) no
    C13A C7A C7B C11A . . . . -17.7(2) yes
    C11A C7B C8 C9 . . . .  .8(3) no
    C7A C7B C8 C9 . . . . -177.58(15) no
    C7B C8 C9 C10 . . . . -1.7(3) no
    C7B C8 C9 C23 . . . . 176.99(17) no
    C8 C9 C10 C11 . . . .  .9(3) no
    C23 C9 C10 C11 . . . . -177.80(19) no
    C9 C10 C11 C11A . . . .  .8(3) no
    C10 C11 C11A O12 . . . . 175.51(17) no
    C10 C11 C11A C7B . . . . -1.8(3) no
    C8 C7B C11A O12 . . . . -176.13(16) no
    C7A C7B C11A O12 . . . . 2.3(3) yes
    C8 C7B C11A C11 . . . . 1.0(3) no
    C7A C7B C11A C11 . . . . 179.42(17) no
    C11 C11A O12 C13 . . . . 165.15(16) no
    C7B C11A O12 C13 . . . . -17.6(3) yes
    C11A O12 C13 O21 . . . . 164.91(15) no
    C11A O12 C13 C13A . . . . 47.1(2) yes
    O21 C13 C13A C7A . . . . -178.37(13) no
    O12 C13 C13A C7A . . . . -61.24(18) yes
    O21 C13 C13A C13B . . . . 61.09(18) no
    O12 C13 C13A C13B . . . . 178.22(13) no
    O20 C7A C13A C13 . . . . 165.64(13) no
    O7 C7A C13A C13 . . . . -76.32(19) no
    C7B C7A C13A C13 . . . . 45.86(18) yes
    O20 C7A C13A C13B . . . . -69.00(17) yes
    O7 C7A C13A C13B . . . . 49.05(18) yes
    C7B C7A C13A C13B . . . . 171.22(12) no
    C6A C6B C13B C13A . . . . 46.13(18) yes
    C6C C6B C13B C13A . . . . -132.09(17) no
    C6A C6B C13B C13C . . . . -71.13(19) no
    C6C C6B C13B C13C . . . . 110.65(19) no
    C13 C13A C13B C6B . . . . 56.68(17) no
    C7A C13A C13B C6B . . . . -65.20(15) yes
    C13 C13A C13B C13C . . . . 175.65(13) no
    C7A C13A C13B C13C . . . . 53.76(16) yes
    C6B C13B C13C C19A . . . . 93.70(19) no
    C13A C13B C13C C19A . . . . -23.28(19) yes
    C6B C13B C13C C13D . . . . -85.02(19) no
    C13A C13B C13C C13D . . . . 158.00(14) no
    C19A C13C C13D C14 . . . . 179.29(15) no
    C13B C13C C13D C14 . . . . -2.0(2) no
    C19A C13C C13D C17A . . . .  .2(2) no
    C13B C13C C13D C17A . . . . 178.92(13) no
    C17A C13D C14 C15 . . . . -1.4(3) no
    C13C C13D C14 C15 . . . . 179.48(16) no
    C13D C14 C15 C16 . . . .  .4(3) no
    C14 C15 C16 C17 . . . . 1.1(3) no
    C15 C16 C17 C17A . . . . -1.6(3) no
    C16 C17 C17A C18 . . . . -178.82(17) no
    C16 C17 C17A C13D . . . .  .6(3) no
    C14 C13D C17A C18 . . . . -179.67(15) no
    C13C C13D C17A C18 . . . .  -.5(2) no
    C14 C13D C17A C17 . . . .  .9(2) no
    C13C C13D C17A C17 . . . . -179.91(14) no
    C17 C17A C18 C19 . . . . 179.84(17) no
    C13D C17A C18 C19 . . . .  .5(3) no
    C17A C18 C19 C19A . . . .  -.1(3) no
    C13D C13C C19A O20 . . . . -179.04(13) no
    C13B C13C C19A O20 . . . . 2.2(2) yes
    C13D C13C C19A C19 . . . .  .2(2) no
    C13B C13C C19A C19 . . . . -178.55(15) no
    C18 C19 C19A C13C . . . .  -.3(3) no
    C18 C19 C19A O20 . . . . 179.05(16) no
    C13C C19A O20 C7A . . . . -14.6(2) yes
    C19 C19A O20 C7A . . . . 166.11(14) no
    O7 C7A O20 C19A . . . . -74.65(18) no
    C7B C7A O20 C19A . . . . 170.03(13) no
    C13A C7A O20 C19A . . . . 47.67(18) yes
    O12 C13 O21 C22 . . . . 69.1(2) no
    C13A C13 O21 C22 . . . . -171.78(15) no
data_ss2
_journal_date_recd_electronic     2000-05-09
_journal_date_accepted     2000-08-29
_journal_name_full     'Acta Crystallographica, Section C'
_journal_year     2000
_journal_volume     56
_journal_issue     12
_journal_page_first     1450
_journal_page_last     1451
_journal_paper_category     FO
_publ_contact_author_name     'Dr Siddhartha Chaudhuri'
_publ_contact_author_address
;
     R.S.I.C., Bose Institute
     93/1 Acharya Prafulla Chandra Road
     Calcutta 700 009
     India
;
_publ_contact_author_email     schaud@bosemain.boseinst.ernet.in
_publ_section_title
;
 13,13a-Dihydro-9-methyl-13-methoxy-1-benzopyrano[4,3-i]-
 dinaphtho[2,1-c;1',2'-f]-2,8-dioxabicyclo[3,3,1]nonane
;
loop_
    _publ_author_name
    _publ_author_address
    'Sahana, Sirin'
;
     Department of Chemistry
     University of Calcutta
     92 Acharya Prafulla Chandra Road
     Calcutta 700 009
     India
;
    'Bandyopadhyay, Chandrakanta'
;
     Department of Chemistry
     RKMVC College
     Rahara  743 186
     India
;
    'Chaudhuri, Siddhartha'
;
    RSIC, Bose Institute
    Calcutta 700 009
    India
;
