Gariboldi P, Pelizzoni F, Tatò M, Verotta L, el-Sebakhy N, Asaad A M, Abdallah R M, Toaima S M
Dipartimento di Scienze Chimiche, Università di Camerino, Italy.
Phytochemistry. 1995 Dec;40(6):1755-60. doi: 10.1016/0031-9422(95)00544-h.
Three new cycloartane glycosides, trigonoside I, II and III, and the known astragalosides I and II were isolated from the roots of Astragalus trigonus. The structures of the new glycosides were totally elucidated by high field (600 MHz) NMR analyses as cycloastragenol-6-O-beta-xylopyranoside, cycloastragenol-3-O-[alpha-L-arabinopyranosyl(1-->2)-beta-D- xylopyranosyl]- 6-O-beta-D-xylopyranoside and cycloastragenol-3-O-[alpha-L-arabinopyranosyl (1-->2)-beta-D-(3-O-acetyl)-xylopyranosyl]-6-O-beta-D-xylopyranoside.
从三角黄芪的根部分离得到三种新的环阿尔廷烷型糖苷，即三角苷I、II和III，以及已知的黄芪苷I和II。通过高场（600 MHz）核磁共振分析完全阐明了这些新糖苷的结构，分别为环黄芪醇-6-O-β-吡喃木糖苷、环黄芪醇-3-O-[α-L-吡喃阿拉伯糖基(1→2)-β-D-吡喃木糖基]-6-O-β-D-吡喃木糖苷和环黄芪醇-3-O-[α-L-吡喃阿拉伯糖基(1→2)-β-D-(3-O-乙酰基)-吡喃木糖基]-6-O-β-D-吡喃木糖苷。
