Uncaria rhynchophylla 嘴叶钩藤
Uncaria rhynchophylla (simplified Chinese:钓钩藤; traditional Chinese:钓钩藤; pinyin:diào gōu téng; literally: "fish hook vine") or the cat's claw herb is a plant species used in traditional Chinese medicine.
(+)-Catechin and (-)-epicatechin are found in the plant as well as the alkaloid rhynchophylline.