1993 Volume 41 Issue 7 Pages 1307-1308
A novel azafluoranthene alkaloid, norimeluteine, has been isolated as a cytotoxic substance from Cissampelos pareira (Menispermaceae), together with an alkaloid having the same skeleton, norruffscine. Carbon-13 nuclear magnetic resonance assignments for the azafluoranthene alkaloids were performed by a combination of two dimentional NMR techniques.