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Phytochemical investigation on the whole plant of Anemone rivularis var. flore-minore led to the isolation of a new labdane-type diterpene glycoside ( 1 ) and a new trihydroxyfuranoid lignanoid glycoside ( 2 ), together with three known triterpene and triterpenoid glycosides ( 3 – 5 ). The structures of the two new compounds were elucidated as β- d -glucopyranosyl (13 S )-13-hydroxy-7-oxo-labda-8,14-diene-18-oate ( 1 ) and (7 S ,7′ R ,8 R ,8′ S )-7′-butoxy-7,9′-epoxy-4,4′,9-trihydroxy-3,3′-dimethoxylignane 9- O -β- d -glucopyranoside ( 2 ), on the basis of extensive spectral analysis and chemical evidence. Compound 1 is characterized by a glucose (Glc) esterified C-18 carboxyl group, which is a rarely encountered labdane-type diterpene glycoside in nature. The two new compounds ( 1 and 2 ) reported here are the first examples of diterpene glycoside and lignanoid glycoside found in the genus Anemone , and the known triterpene and triterpenoid glycosides ( 3 – 5 ) are identified for the first time from the title plant. |
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