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Cucurbitacins from Cayaponia racemosa: isolation and total assignment of 1H and 13C NMR spectra

✍ Scribed by Davina C. Chaves; João Carlos C. Assunção; Raimundo Braz-Filho; Telma L. G. Lemos; Francisco J. Q. Monte

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
108 KB
Volume
45
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Two new cucurbitane‐type triterpenoids, 2β,3β,16α,20(R),25‐pentahydroxy‐9‐methyl‐19‐norlanost‐5‐en‐7,22‐dione and 2β,3β,16α,20(R),25‐pentahydroxy‐9‐methyl‐19‐norlanost‐5‐en‐7,11,22‐trione, were isolated from fruits of Cayaponia racemosa. The total ^1^H and ^13^C chemical shift assignment of these two closely related compounds is described, making use of one‐ and two‐dimensional NMR techniques. Copyright © 2007 John Wiley & Sons, Ltd.

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