Two new nor-triterpene glycosides from peruvian "Uña de Gato" (Uncaria tomentosa).
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.
Kitajima
Mariko
M
Graduate School of Pharmaceutical Sciences, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan.
Hashimoto
Ken-Ichiro
K
Yokoya
Masashi
M
Takayama
Hiromitsu
H
Sandoval
Manuel
M
Aimi
Norio
N
D020948:Cat's Claw / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D006868:Hydrolysis; D008519:Medicine, Traditional; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010568:Peru; D010946:Plants, Medicinal / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
D006027:Glycosides; D014315:Triterpenes; C475236:tomentoside A; C475237:tomentoside B