Cui C B, Tezuka Y, Kikuchi T, Nakano H, Tamaoki T, Park J H
Research Institute for Wakan-Yaku, Toyama Medical and Pharmaceutical University, Japan.
Chem Pharm Bull (Tokyo). 1990 Dec;38(12):3218-25. doi: 10.1248/cpb.38.3218.
A new gamma-lactone derivative named davallialactone (4) and the 7-O-beta-D-glucuronide of (+/-)-eriodictyol (5a) have been isolated from Davallia mariessi Moore along with caffeic acid (1), 4-beta-D-glucopyranosylcaffeic acid (2) and 4-O-beta-D-glucopyranosyl-p-coumaric acid (3). The structures of the new compounds were determined by chemical and spectroscopic methods including two-dimensional nuclear magnetic resonance (2D NMR) techniques, especially 1H-detected heteronuclear multiple-bond multiple-quantum coherence and long-range C-H J-resolved 2D NMR techniques.
