Warashina Tsutomu, Noro Tadataka
Institute for Environmental Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan.
Chem Pharm Bull (Tokyo). 2010 Feb;58(2):172-9. doi: 10.1248/cpb.58.172.
Further study of constituents from the aerial parts of Asclepias tuberosa afforded twenty-two new steroidal glycosides along with tuberoside B(5) and G(5). These glycosides were confirmed to contain 8,12;8,20-diepoxy-8,14-secopregnanes, tuberogenin and its congeners, as their aglycones. The structure of each of these compounds was elucidated based on the interpretation of NMR and MS measurements and from chemical evidence.
对块根马利筋地上部分成分的进一步研究得到了22种新的甾体糖苷以及块根糖苷B(5)和G(5)。这些糖苷被证实含有8,12;8,20-二环氧-8,14-裂孕甾烷、块根皂苷元和其同系物作为它们的苷元。基于核磁共振（NMR）和质谱（MS）测量结果的解释以及化学证据阐明了这些化合物各自的结构。
