Huperzine B
石杉碱乙
Also known as: 12-Methyl-2,3,4,4a,5,6-hexahydro-1H-5,10b-prop[1]eno-1,7-phenanthrolin-8(7H)-one, (4aR,5R,10bR)-12-Methyl-2,3,4,4a,5,6-hexahydro-1H-5,10b-prop[1]eno-1,7-phenanthrolin-8(7H)-one, 8,15-Didehydrolycodin-1(18H)-one, Fordimine, Huperzine B USP/EP/BP, Huperzine B-RM
Huperzine B (CAS 103548-82-9) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C16H20N2O and a molecular weight of 256.343 g/mol. It is also known as 12-Methyl-2,3,4,4a,5,6-hexahydro-1H-5,10b-prop[1]eno-1,7-phenanthrolin-8(7H)-one, (4aR,5R,10bR)-12-Methyl-2,3,4,4a,5,6-hexahydro-1H-5,10b-prop[1]eno-1,7-phenanthrolin-8(7H)-one and 8,15-Didehydrolycodin-1(18H)-one. Key properties include a boiling point of 533.5±50.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 216.4±30.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 103548-82-9
- Jingsj CID
- J-1963142-6
- Molecular Formula
- C16H20N2O
- Chinese Name
- 石杉碱乙
- Molecular Weight
- 256.343 g/mol
- Category
- Organic Bases
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 533.5±50.0 °C at 760 mmHg |
|---|---|
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 216.4±30.3 °C |
| Exact Mass | 256.157562 |
| PSA | 44.89000 |
| LogP | 1.98 |
| Vapor Pressure | 0.0±1.4 mmHg at 25°C |
| Refractive Index | 1.624 |
Activity & Biological Data
| Target | AChE[1] |
|---|---|
| Additional Information | [1]. Zhang HY, et al. Huperzine B, a novel acetylcholinesterase inhibitor, attenuates hydrogen peroxide induced injury in PC12 cells. Neurosci Lett. 2000 Sep 29;292(1):41-4. [2]. He XC, et al. Study on dual-site inhibitors of acetylcholinesterase: Highly potent derivatives of bis- and bifunctional huperzine B. Bioorg Med Chem. 2007 Feb 1;15(3):1394-408. |
Frequently Asked Questions
What is the CAS number of Huperzine B?
The CAS number of Huperzine B is 103548-82-9.
What are the molecular formula and molecular weight of Huperzine B?
Huperzine B has molecular formula C16H20N2O and molecular weight 256.343 g/mol.
What are the upstream and downstream products of Huperzine B?
For Huperzine B, Upstream Products: Pulegone; Downstream Products: 7-Methylquinoline, 2-Hydroxy-6-methylpyridine.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Huperzine B (CAS 103548-82-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1963142-6 (accessed 2026-10-28).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.