New Oleanan-Type Triterpene and Cincholic Acid Glycosides from Peruvian “Uña de Gato” ( Uncaria tomentosa )

A new oleanan-type triterpene (1) and three new cincholic acid glycosides (2—4) were isolated from Peruvian “Una de Gato” (Cat's claw, plant of origin: Uncaria tomentosa), a traditional herbal medicine in Peru. Their structures were determined by spectroscopic analysis.