STUDIES ON THE CONSTITUENTS OF ASCLEPIADACEAE PLANT-LVII. THE STRUCTURES OF SIX GLYCOSIDES, WILFOSIDE C1N, C2N, C3N, C1G, AND C3G, WITH NOVEL SUGAR CHAIN CONTAINING A PAIR OF OPTICALLY ISOMERIC SUGARS

Article abstract of DOI:10.1016/S0040-4020(01)96411-7

Six new glycosides named wilfoside C3N (1), C1N (2), C2N (3), C3G (4), C1G (5) and C2G (6) were isolated from Cynanchum wilfordi HEMSLEY (Asclepiadaceae) and their structures were deducted on the basis of the chemical and spectral evidence.It is quite unusual that 2, 3, 5 and 6 include both D-cymarose and L-cymarose in each sugar chain.