Sinensioside A,a new sesquilignan glycoside from Selaginella sinensis

AIM:To investigate the chemical constituents of Selaginella sinensis(Desv.) Spring.METHODS:Chromatographic separations on Diaion HP-20,silica gel,and Sephadex LH-20 were used.The structures of the isolates were elucidated on the basis of spectroscopic analysis,as well as chemical methods.RESULTS:Eight compounds were obtained and their structures were identified as sinensioside A(1),syringaresinol-4-O--D-glucopyranoside(2),(+)-medioresinol-4-O--D-glucopyranoside(3),pinoresinol-4,4'-di-O--D-glucopyranoside(4),quercetin(5),eucomic acid(6),shikimic acid(7),and 2,3-dihydroamentoflavone(8).CONCLUSION:Compound 1 is a new dihydrobenzofuran sesquilignan glycoside from Selaginella sinensis.