Five new pregnane glycosides from the stems of Marsdenia tenacissima

Zeng-Hua Xia Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, 201203, China

Shi-Long Mao Department of Pharmacy, Shanghai Xuhui Central Hospital, Shanghai, 200031, ChinaCorrespondence[email protected]

Ai-Na Lao Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, 201203, China

Jun Uzawa The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama, 351-0198, Japan

Shigeo Yoshida The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama, 351-0198, Japan

Yasuo Fujimoto College of Pharmacy, Nihon University, 7-7-1, Narashinodai, Funabashi, Chiba, 274-8555, JapanCorrespondence[email protected]

Abstract

Activity-guided fractionation of the stems of Marsdenia tenacissima led to the isolation of five new pregnane glycosides, namely marstenacissides E (1), F (2), G (3), H (4), and I (5). Their structures were determined on the basis of ¹H and ¹³C NMR, COSY, TOCSY, ROESY, and FABMS experiments.

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Five new pregnane glycosides from the stems of Marsdenia tenacissima

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