STUDIES ON THE SOLANACEOUS PLANTS .35. STEROIDAL GLYCOSIDES FROM SOLANUM-TORVUM

Seven new steroidal glycosides, named torvosides A-G, were isolated fr om the aerial parts and from the roots of Solanum torvum. Their struct ures were characterized as (25S)-26-O-beta-D-glucopyranosyl)-5 alpha-f urostan-3 beta,6 alpha,22 xi,26-tetraol 6-O-[alpha-L-rhamnopyranosyl-( 1 --> 3)-beta-D-quinovopyuranoside], (25S)-26-O-(beta-D-glucopyranosyl )-22 alpha-methoxy-5 alpha-furostan-3 beta,6 alpha,26-triol 6-O-[beta- D-xylopyranosyl-(1 --> 3)-beta-D-quinovopyranoside], neosolaspigenin 6 -O-[alpha-L-rhamnopyranosyl-(1 --> 3)-beta-D-quinovopyranoside], neoso laspigenin 6-O-[beta-D-xylopyranosyl-(1 --> 3)-beta-D-quinovopyranosid e], (25S)-26-O-(beta-D-glucopyranosyl)-6 alpha,26-dihydroxy-22 alpha-m ethoxy -5 alpha-furostan-3-one 6-O-(beta-D-quinovopyranoside), (25S)-2 6-O-(beta-D-glucopyranosyl)-6 alpha,26-dihydroxy-22 alpha-methoxy-5 al pha-furostan-3-one 6-O-[beta-D-xylopyranosyl-(1 --> 3)-beta-D-quinovop yranoside], and (25S)-26-hydroxy -22 alpha-methoxy-5 alpha-furostan-3- one 26-O-(beta-D-glucopyranoside), respectively. Copyright (C) 1996 El sevier Science Ltd