Phytochemical investigation of the aerial parts of Gymnema sylvestre has led to the isolation of seven new triterpenes, six oleane types (5, 7-11) and a new lupane type (12), and of the six known analogues 1-4, 6, and 13. The structures and relative configurations of these compounds were elucidated by spectroscopic analyses, including 1D- and 2D-NMR spectroscopy and mass spectrometry, and by the comparison of their NMR data with those of related compounds.
New Triterpenes from Gymnema sylvestre / Zarrelli, Armando; DELLA GRECA, Marina; Afef, Ladhari; Rabiaa, Haouala; Previtera, Lucio. - In: HELVETICA CHIMICA ACTA. - ISSN 0018-019X. - 96:6(2013), pp. 1036-1045. [10.1002/hlca.201200331]
New Triterpenes from Gymnema sylvestre
ZARRELLI, ARMANDO;DELLA GRECA, MARINA;PREVITERA, LUCIO
2013
Abstract
Phytochemical investigation of the aerial parts of Gymnema sylvestre has led to the isolation of seven new triterpenes, six oleane types (5, 7-11) and a new lupane type (12), and of the six known analogues 1-4, 6, and 13. The structures and relative configurations of these compounds were elucidated by spectroscopic analyses, including 1D- and 2D-NMR spectroscopy and mass spectrometry, and by the comparison of their NMR data with those of related compounds.File | Dimensione | Formato | |
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