What is Uncaria rhynchophylla?
Uncaria rhynchophylla (or Gouteng in Chinese), UNCARIAE RAMULUS CUM UNCIS), is an essential Chinese herbal material with a long history. Uncaria rhynchophylla ethanol-extracted powder, which preserves the Chinese herb’s properties, is also widely used in dietary supplements.
- Its harvest in autumn and winter, remove leaves, cut and dry.
- Parts used: dried stems and branches with hooks.

Uncaria rhynchophylla chemical constituents include:
- Alkaloids: rhynchophylline, isorhynchophylline, corynoxeine,isocorynoxeine, corynoxine,corynoxine B, etc.
- Flavonoids: hypericin, etc.
- Others: mitragynin, isomitragynin, etc.

Research shows that the total alkaloid content of different parts of Uncaria rhynchophylla varies. For example, the underground skin is 0.65%, the epidermis is 0.30%, the hook is 0.28%, the young branches and leaves are 0.18%, and the xylem is 0.022% to 0.04%.
Uncaria rhynchophylla VS Uncaria tomentosa (Cat’s Claw)
Uncaria rhynchophylla and Uncaria tomentosa are both common species of the family of Rubiaceae, and what’s the difference between them?
| Product name | Uncaria rhynchophylla | Uncaria tomentosa |
| Synonym | Gou Teng | Cat’s Claw,uña de gato |
| Origin place | China Guangxi, Jiangxi, Hunan, Zhejiang, Guangdong, Sichuan, Yunnan, etc. | South and Central America, Peru, etc |
| Common species | Uncaria rhynchophylla,Uncaria macrophylla,Uncaria sinensis,
Uncaria sessilifrudus,etc |
Uncaria. tomentosa and Uncaria. guianensis |
| Part used | Dried stem, branch & hooks | Vine bark, root |
| Standardized Extract | 1%-10%Uncaria total alkaloids | 3% alkaloids and 15% phenols |
Uncaria rhynchophylla Extract total alkaloids
It was reported that the active pharmacological component was the alkaloids of Uncaria rhynchophyllina, reprententive are rhynchophylline and isorhynchophylline.

Rhyncholphylline, its cas# is 76-66-4, while the CAS number of Isorhynchophylline is 6859-01-4.
Where to buy Uncaria rhynchophylla Extract
Cima Science Team has researched Uncaria rhynchophylla since 2018, from raw materials to manufacturing to applications, providing bulk Uncaria rhynchophylla Extract powder from 1%-10% Uncaria total alkaloids different specifications, confirmed offer high quality and provide related technical supports.
If you are interested in Uncaria rhynchophylla Extract or want to use it in your new formula, please feel free to contact the Cima sales team. We will provide feedback on your quality documents and quotation within 24 hours.



