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Two new nor-triterpene glycosides from peruvian "Uña de Gato" (Uncaria tomentosa)
Mariko Kitajima1, Ken-Ichiro Hashimoto, Masashi Yokoya
1Graduate School of Pharmaceutical Sciences, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan.
Journal of Natural Products
|March 1, 2003
Abstract:
Two new 27-nor-triterpene glycosides, tomentosides A (1) and B (2), were isolated from Peruvian "Uña de Gato" (cat's claw, plant of origin: Uncaria tomentosa), a traditional herbal medicine in Peru. Their structures were determined by spectroscopic analysis and chemical interconversions. This is the first report of naturally occurring pyroquinovic acid glycosides.
