The herb's botanical name, Uncaria, is from the Latin uncus, for "hook." Cat’s claw extractActive Ingredient: alkaloidsSpecification: 3%Test Method: UV-VISWhat Is It?Cat's claw, also known as Uno de Gato csp (its Spanish name), is a high-climbing, woody vine that grows profusely in the upper Amazon regions of Peru, Columbia, Ecuador, and other South American countries. At the base of the plant's ...