Clinical data
Routes of
ATC code none
Legal status
Legal status
  • Uncontrolled
CAS Number 57559-68-9
PubChem (CID) 5311191
ChemSpider 4470712
Chemical and physical data
Formula C19H21NO2
Molar mass 295.38 g/mol
3D model (Jmol) Interactive image
Density 1.2 g/cm3
Boiling point 446 to 536[1] °C (835 to 997 °F)

N-n-Propylnorapomorphine (NPA) is an aporphine derivative dopamine agonist closely related to apomorphine.[2][3] In rodents it has been shown to produce hyperactivity, stereotypy, hypothermia, antinociception, and penile erection, among other effects.[4][5][6][7] Notably, its effects on locomotion are biphasic, with low doses producing inhibition and catalepsy and high doses resulting in enhancement of activity.[8] This is likely due to preferential activation of D2/D3 autoreceptors versus postsynaptic receptors,[9] the latter of which overcomes the former to increase postsynaptic dopaminergic signaling only with high doses.

See also


  1. "(6aS)-6-Propyl-5,6,6a,7-tetrahydro-4H-dibenzo[de,g]quinoline-10,11-diol". ChemSpider. Retrieved 16 January 2016.
  2. Miller RJ, Kelly PH, Neumeyer JL (January 1976). "Aporphines. 15. Action of aporphine alkaloids on dopaminergic mechanisms in rat brain". European Journal of Pharmacology. 35 (1): 77–83. doi:10.1016/0014-2999(76)90302-2. PMID 943290.
  3. Creese I, Padgett L, Fazzini E, Lopez F (July 1979). "3H-N-n-propylnorapomorphine: a novel agonist ligand for central dopamine receptors". European Journal of Pharmacology. 56 (4): 411–2. doi:10.1016/0014-2999(79)90274-7. PMID 477735.
  4. Menon MK, Clark WG, Neumeyer JL (November 1978). "Comparison of the dopaminergic effects of apomorphine and (−)-N-n-propylnorapomorphine". European Journal of Pharmacology. 52 (1): 1–9. doi:10.1016/0014-2999(78)90015-8. PMID 569056.
  5. Riffee WH, Wilcox RE, Smith RV (March 1979). "Stereotypic and hypothermic effects of apomorphine and N-n-propylnorapomorphine in mice". European Journal of Pharmacology. 54 (3): 273–7. doi:10.1016/0014-2999(79)90086-4. PMID 570924.
  6. Neumeyer JL, Reinhard JF, Dafeldecker WP, et al. (January 1976). "Aporphines. 14 Dopaminergic and antinociceptive activity of aporphine derivatives. Synthesis of 10-hydroxyaporphines and 10-hydroxy-N-n-propylnoraporphine". Journal of Medicinal Chemistry. 19 (1): 25–9. doi:10.1021/jm00223a006. PMID 942751.
  7. Benassi-Benelli A, Ferrari F, Quarantotti BP (December 1979). "Penile erection induced by apomorphine and N-n-propyl-norapomorphine in rats". Archives Internationales de Pharmacodynamie et de Thérapie. 242 (2): 241–7. PMID 44457.
  8. Campbell A, Baldessarini RJ, Ram VJ, Neumeyer JL (October 1982). "Behavioral effects of (-)10,11-methylenedioxy-N-n-propylnoraporphine, an orally effective long-acting agent active at central dopamine receptors, and analogous aporphines". Neuropharmacology. 21 (10): 953–61. doi:10.1016/0028-3908(82)90106-X. PMID 6890636.
  9. Argiolas A, Mereu G, Serra G, Melis MR, Fadda F, Gessa GL (January 1982). "N-n-propyl-norapomorphine: an extremely potent stimulant of dopamine autoreceptors". Brain Research. 231 (1): 109–16. doi:10.1016/0006-8993(82)90011-7. PMID 6799148.

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