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Triterpenoid saponins from Isertia pittieri
B H Um1, B Weniger, A Lobstein
1Laboratoire de Pharmacognosie, Faculté de Pharmacie, CNRS UMR7081, Université Louis Pasteur Strasbourg, BP 24, 67401 Illkirch Cedex, France.
Journal of Natural Products
|January 5, 2002
Abstract:
Two new 27-nor-triterpenoid saponins, pyrocincholic acid 3 beta-O-beta-D-quinovopyranosyl-28-[beta-D-glucopyranosyl(1-->6)-beta-D-glucopyranosyl] ester (1) and pyrocincholic acid 3 beta-O-beta-D-quinovopyranosyl(1-->6)-beta-D-glucopyranosyl-28-[beta-D-glucopyranosyl(1-->2)-beta-D-glucopyranosyl] ester (2) were isolated from the stem bark of Isertia pittieri, together with two known bidesmosidic quinovic acid glycosides. The structures of 1 and 2 were determined on the basis of spectroscopic studies.