phenylpropylaminopentane phenylpropylaminopentane (-)-1-phenyl-2-propylaminopentane (also known as (-)-ppap and n,α-dipropylphenethylamine) is a stimulant of the substituted phenethylamine class and a derivative of selegiline. when compared with selegiline and other substituted phenethylamines (-)-ppap has a notably different mechanism of action and pharmacological effect. phenylpropylaminopentanelegal statuslegal status uk: class a identifiers iupac name (r)-1-phenyl-n-propylpentan-2-amine cas number784118-64-5 ypubchem cid51529346chemspider21106218uniiuz3q3c2z57chemical and physical dataformulac14h23nmolar mass205.345 g·mol−13d model (jsmol)interactive image smiles cccn(ccc)cc1ccccc1 inchi inchi=1s/c14h23n/c1-3-8-14(15-11-4-2)12-13-9-6-5-7-10-13/h5-7,9-10,14-15h,3-4,8,11-12h2,1-2h3/t14-/m1/s1key:pbensvgegpjnfj-cqszacivsa-n (-)-ppap is classified as a monoaminergic activity enhancer that stimulates the impulse propagation mediated transmitter release of the neurotransmitters dopamine, norepinephrine and serotonin in the brain. unlike stimulants such as amphetamine, which release a flood of monoamine neurotransmitters in an uncontrolled manner, (-)-ppap instead only increases the amount of neurotransmitters that get released when a neuron is stimulated by receiving an impulse from a neighbouring neuron. both amphetamine and (-)-ppap promote the release of monoamines and deuteramines, however while amphetamine causes neurons to dump neurotransmitter stores into the synapse regardless of external input, (-)-ppap does not influence the pattern of neurotransmitter release and instead releases a larger amount of neurotransmitters than normal. (-)-ppap has no monoamine oxidase inhibitory activity.