... 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 ... herb's botanical name, Uncaria, is from the Latin uncus, for "hook."Two species of cat ... One contains mainly pentacylic alkaloids, substances responsible for the most well-researched effect of cat ...