Constituents of a Fern, Davallia mariesii MOORE. IV. Isolation and Structures of a Novel Norcarotane Sesquiterpene Glycoside, a Chromone Glucuronide, and Two Epicatechin Glycosides

Cheng-Bin CUI; Yasuhiro TEZUKA; Tohru KIKUCHI; Hirofumi NAKANO; Tatsuya TAMAOKI; Jong-Hee PARK

doi:10.1248/cpb.40.2035

Cheng-Bin CUI, Yasuhiro TEZUKA, Tohru KIKUCHI, Hirofumi NAKANO, Tatsuya TAMAOKI, Jong-Hee PARK

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Keywords: Davallia mariesii, Davalliaceae, norcarotane sesquiterpene glucoside, marioside, (-)-epicatechin-5-O-β-D-glucopyranoside, 5, 7-dihydroxychromone-7-O-β-D-glucuronide methyl ester, (-)-epicatechin-3-O-β-D-allopyranoside, ^1H-NMR, ^<13>C-NMR, HMBC

JOURNAL FREE ACCESS

1992 Volume 40 Issue 8 Pages 2035-2040

DOI https://doi.org/10.1248/cpb.40.2035

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Abstract

Three new compounds, (-)-epicatechin-5-O-β-D-glulcopyranodside (1), 5, 7-dihydroxychromone-7-O-β-D-glucuronide methyl ester (6), and a novel norcarotane sesquiterpene glucoside named marioside (7), have been isolated from the rhizomes of Davallia mariesii MOORE together with five known compounds, (-)-epicatechin-3-O-β-D-allopyranoside (2), coumaric acid-4-O-β-D-glucopyranoside (3), caffeic acid-4-O-β-D-glucopyranoside (4), vanillic acid-4-O-β-D-glucopyranoside (5), and L-tryptophan (8). The structures of the new compounds (1, 6, and 7) were determined by means of spectroscopic methods including two-dimensional nuclear magnetic resonance techniques.

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