l-norpseudoephedrine l-norpseudoephedrine l-norpseudoephedrine, or (−)-norpseudoephedrine, is a psychostimulant drug of the amphetamine family. it is one of the four optical isomers of phenylpropanolamine, the other three being cathine ((+)-norpseudoephedrine), (−)-norephedrine, and (+)-norephedrine; as well as one of the two enantiomers of norpseudoephedrine (the other being cathine). similarly to cathine, l-norpseudoephedrine acts as a releasing agent of norepinephrine (ec50 = 30 nm) and to a lesser extent of dopamine (ec50 = 294 nm). due to the 10-fold difference in its potency for inducing the release of the two neurotransmitters however, l-norpseudoephedrine could be called a modestly selective or preferential norepinephrine releasing agent, similarly to related compounds like ephedrine and pseudoephedrine. l-norpseudoephedrineclinical dataatc codenoneidentifiers iupac name (1r,2r)-2-amino-1-phenyl-1-propanol cas number37577-07-4 ypubchem cid162265chemspider142493uniiqq0fvc4pxscomptox dashboard (epa)dtxsid20889399 echa infocard100.164.234 chemical and physical dataformulac9h13nomolar mass151.209 g·mol−13d model (jsmol)interactive image smiles o(c1ccccc1)(n)c inchi inchi=1s/c9h13no/c1-7(10)9(11)8-5-3-2-4-6-8/h2-7,9,11h,10h2,1h3/t7-,9+/m1/s1key:dlnkoykmwoxyqa-appzfptmsa-n