摘要:
Chemical examination of the bulbs of Allium giganteum and A. aflatunense has led to the isolation of two new steroidal saponins together with a known saponin. The structure of the new saponin from A. giganteum was characterized as (24S,25R)-5-alpha-spirostan-2-alpha,3-beta,5-alpha,6-beta,24-pentaol 24-O-beta-D-glucopyranoside and that from A. aflatunense as (25R)-5-aplha-spirostan-2-alpha,3-beta,5-alpha,6-alpha-tetraol 2-O-beta-D-glucopyranoside by spectral and chemical means, and by comparing the data with those of a known compound.