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

Chaves Davina C. | Zendy; Assunção João Carlos C. | Zendy; BrazFilho Raimundo | Zendy; Lemos Telma L. G. | Zendy; Monte Francisco J. Q. | Zendy

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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.

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