ARYL AND TRITERPENIC GLYCOSIDES FROM MARGYRICARPUS-SETOSUS

Investigation of aerial parts of Margyricarpus setosus afforded three new aryl glycosides, beta-hydroxy-phenylethyl-O-alpha-L-rhamnopyranosy l (1 --> 6)-beta-D-glucopyranoside, benzyl-O-alpha-L-rhamnopyranosyl ( 1 --> 6)-beta-D-glucopyranoside, 4-methoxybenzyl-O-alpha-L-rhamnopyran osyl (1 --> 6)-beta-D-glucopyranoside, and three new triterpene glycos ides, tormentic acid 3 beta-O-beta-D-quinovopyranoside, tormentic acid 3 beta-O-beta-D-fucopyranoside and tormentic acid 3 beta-O-alpha-L-rh amnopyranoside. Twelve known compounds were also found, among them bet a-hydroxy-3',4'-dimethoxyphenylethyl glucoside and beta-hydroxy-5',4'- dimethoxyphenylethyl rutinoside, which were obtained previously by par tial synthesis, were isolated for the first time from a natural source . The structures of the new compounds were elucidated on the basis of chemical and spectral data.