Uncaria rhynchophylla

Uncaria rhynchophylla (simplified Chinese: 钓钩藤; traditional Chinese: 釣鉤藤; 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.