New sarverogenin and isosarverogenin glycosides from Cryptolepis buchanani (Asclepiadaceae)

Purushothaman, K. K., Vasanth, S., Connolly, J. D. and Rycroft, D. S. (1988) New sarverogenin and isosarverogenin glycosides from Cryptolepis buchanani (Asclepiadaceae). Revista Latinoamericana de Química, 19(1), pp. 28-31.

Abstract

The structures of cryptanosides A and C, the major cardenolide glycosides of the leaves and roots respectively of Cryptolepis buchanani, have been established as sarverogenin 3-O-α-L-oleandroside and sarverogenin 3-O-[β-D-glucopyranosyl-(1→4)-α-L-oleandroside] on the basis of their ¹H and ¹³C NMR spectroscopic properties and chemical correlation with sarverogenin. Cryptanoside B, a minor constituent of the leaf extract, is isosarverogenin 3-O-α-L-oleandroside. Cryptanoside D, the corresponding isosarverogenin derivative of cryptanoside C, was isolated, as its acetate, from the crude product of acetylation of cryptanoside C. Germanicol docosanoate is a major constituent of the root extract.

• Item Type: Articles
• Keywords: Natural product chemistry, NMR spectroscopy.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Connolly, Professor Joseph and Rycroft, Dr David
• Authors: Purushothaman, K. K., Vasanth, S., Connolly, J. D., and Rycroft, D. S.
• Subjects: Q Science > QD Chemistry
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: Revista Latinoamericana de Química
• Journal Abbr.: Rev. Latinoamer. Quím.
• ISSN: 0370-5943