DEFINITION

Cat's Claw consists of the inner bark of the stems of Uncaria tomentosa (Willd.) DC. (Rubiaceae). It contains NLT 0.3% of pentacyclic oxindole alkaloids as isopteropodine, calculated on the dried basis, as the sum of speciophylline, uncarine F, mitraphylline, isomitraphylline, pteropodine, and isopteropodine.