Propylamphetamine
Chemical compound
From Wikipedia, the free encyclopedia
Propylamphetamine (code name PAL-424; also known as N-propylamphetamine or NPA) is a psychostimulant of the amphetamine family which was never marketed. It was first developed in the 1970s, mainly for research into the metabolism of,[1] and as a comparison tool to, other amphetamines.[2]
Other namesN-Propylamphetamine; NPA; PAL-424
ATC code
- none
Legal status
- UK: Not controlled
MetabolismHepatic
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| Other names | N-Propylamphetamine; NPA; PAL-424 |
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| Metabolism | Hepatic |
| Excretion | Renal |
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| ECHA InfoCard | 100.215.934 |
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| Formula | C12H19N |
| Molar mass | 177.291 g·mol−1 |
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Propylamphetamine is inactive as a dopamine releasing agent in vitro and instead acts as a low-potency dopamine reuptake inhibitor with an IC50 of 1,013 nM.[3] The drug can be N-dealkylated to form amphetamine (10–20% excreted in urine after 24 hours).[4][5] A study in rats found propylamphetamine to be approximately 4-fold less potent than amphetamine.[6][7]
| Compound | NE | DA | 5-HT | Ref | ||
|---|---|---|---|---|---|---|
| Phenethylamine | 10.9 | 39.5 | >10,000 | [3][8][9] | ||
| d-Amphetamine | 6.6–10.2 | 5.8–24.8 | 698–1,765 | [10][11][9][12] | ||
| d-Methamphetamine | 12.3–14.3 | 8.5–40.4 | 736–1,292 | [10][13][9][12] | ||
| Ethylamphetamine | ND | 88.5 | ND | [3] | ||
| d-Ethylamphetamine | 28.8 | 44.1 | 333.0 | [6][14] | ||
| Propylamphetamine | ND | RI (1,013) | ND | [3] | ||
| Butylamphetamine | ND | IA (>10,000) | ND | [3] | ||
| Notes: The smaller the value, the more strongly the drug releases the neurotransmitter. The assays were done in rat brain synaptosomes and human potencies may be different. See also Monoamine releasing agent § Activity profiles for a larger table with more compounds. Refs:[15][16] | ||||||