Premium
Cucurbitacins from Cayaponia racemosa : isolation and total assignment of 1 H and 13 C NMR spectra
Author(s) -
Chaves Davina C.,
Assunção João Carlos C.,
BrazFilho Raimundo,
Lemos Telma L. G.,
Monte Francisco J. Q.
Publication year - 2007
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1970
Subject(s) - chemistry , triterpenoid , nmr spectra database , stereochemistry , spectral line , chemical shift , triterpene , nuclear magnetic resonance spectroscopy , astronomy , medicine , physics , alternative medicine , pathology
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.