作者:Yukiko Matsuo、Reina Takaku、Yoshihiro Mimaki
DOI:10.3390/molecules200916255
日期:——
Examination of the bulbs of Lilium pumilum (Liliaceae) led to the isolation of four novel steroidal glycosides (1-4) with a 2,3,4-trisubstituted β-d-glucopyranosyl unit. In 1 and 3, the α-L-arabinopyranosyl moiety is linked to C-3 of the inner trisubstituted β-D-glucopyranosyl group and is present as an usual ⁴C₁ conformation. In contrast, in 2 and 4, the α-L-arabinopyranosyl moiety, which is attached
铝百合(Liiliaceae)鳞茎的检查导致分离出带有2,3,4-三取代的β-d-吡喃葡萄糖基单元的四个新型甾体糖苷(1-4)。在1和3中,α-L-阿拉伯吡喃糖基部分与内部三取代的β-D-吡喃葡萄糖基的C-3连接,并以通常的⁴C⁴构象存在。相反,在2和4中,与内部三取代的β-D-吡喃葡萄糖基的C-4相连的α-L-阿拉伯吡喃糖基部分以C 1构象存在。基于光谱分析的结果,包括二维(2D)NMR数据和水解,确定了新的甾体糖苷的结构。