Objective To study the chemical constituents of Dendrobium officinale in order to provide more scientific basis for its development and utilization of medicinal resources.Methods The compounds were isolated and purified by repeated column chromatography with silica gel and ODS column,and semi-preparative HPLC.Their structures were identified by spectroscopic data.Results Fourteen compounds were isolated from the 70％ ethanol extract of D.officinale and identified as:benzyl-O-β-D-glucopyranoside (1),isorhamnefin-3-O-α-L-rhamnopyranosyl (1→2)-β-D-glycopyranoside (2),conicaoside (3),3,4,5-trimethoxyphenyl-1-β-D-glucopyranoside (4),2,6-dimethoxy-4-hydroxyphenol-l-O-β-D-glucoside (5),4-(3'-hydroxypropyl)-2,6-dimethoxy-phenol-3'-O-β-D-glcoside (6),thymidine (7),syringin (8),4-allyl-2,6-dimethoxyphenyl glucoside (9),(+)-syringaresinol (10),syringaresinol-4'-O-β-D-monoglucoside (11),naringenin (12),p-hydroxybenzoic acid (13),and 4,4'-dihydroxy-3,5-dimethoxybibenzyl (14).Conclusion The compouds 1-6 are isolated from the species of Dendrobium Sw.for the first time,and 7-8 are isolated from D.officinale for the first time.
Dendrobium officinale Kimura et Migobenzyl-O-β-D-glucopyranosideisorhamnetin-3-O-α-L-rhamnopyranosyl (1→2)-β-D-glycopyranoside3,4,5-trimethoxyphenyl-1-β-D-glucopyranosidesyringin
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