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Four known triterpenoids isolated from three Brazilian plants: 1H and 13C chemical shift assignments

✍ Scribed by F. P. Soares; C. A. V. Ronconi; E. V. L. da Cunha; J. M. Barbosa-Filho; M. S. da Silva; R. Braz-Filho

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 224 KB
Volume: 36
Category: Article
ISSN: 0749-1581
DOI: 10.1002/(sici)1097-458x(199808)36:8<608::aid-omr335>3.0.co;2-k

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✦ Synopsis

3b,19a,

acid and 7-oxofriedelin is described. In addition to conventional 1D NMR methods, 2D shiftcorrelated NMR experiments [1H ] 1H-COSY, (HETCOR and HMQC), 1H ] 13C-COSYÈ1J CH 1H ] 13C-(n \ 2 and 3, COLOC and HMBC)] and 2D 1H ] 1H-NOESY were used for 1H and 13C chemical COSYÈnJ CH shift assignments of these triterpenoids.

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