New C28 steroidal glycosides from Tubocapsicum anomalum
New C28 steroidal glycosides from Tubocapsicum anomalum
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DOI：
10.1248/cpb.56.1038
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发表时间：
2008-07-01
影响因子：
1.7
通讯作者：
Nohara, Toshihiro
中科院分区：
文献类型：
--
作者：
Kiyota, Naoko;Shingu, Kazushi;Nohara, Toshihiro
从土辣椒（Tubocapsicum anomalum -m）的果实中分离到了两个新的C-28甾体苷：土辣椒苷A(1)和B(2)。通过对这两种苷的皂苷醇衍生物tuboanosigenin(3)的对溴苯甲酰衍生物(4)的光谱和x射线衍射分析，确定了它们的化学结构。Tuboanosides具有一个不寻常的侧链的结构特点，它携带一个不寻常的连接，在内酯环上有一个C-21与C-25结合。
Two new C-28 steroidal glycosides, tuboanosides A (1) and B (2), were isolated from the fruit of Tubocapsicum anomalum MAKE-m. Their chemical structures were elucidated on the basis of spectroscopic and X-ray diffraction analysis of the p-bromobenzoyl derivative (4) of tuboanosigenin (3), the sapogenol derivative of these two glycosides. Tuboanosides have the structural peculiarity of an unusual side chain carrying an unusual linkage with a C-21 bound to C-25 on the lactone ring.