alphacetylmethadol alphacetylmethadol alphacetylmethadol (inn), or α-acetylmethadol (aam), is a synthetic opioid analgesic. its levorotary enantiomer, levacetylmethadol, is an fda-approved treatment for opioid addiction. alphacetylmethadol is very similar in structure to methadone, a widely prescribed treatment for opioid addiction. in the united states, it is a schedule i controlled substance under the controlled substances act (presumably because it was never marketed in the us, as is the case with other common opiate/opioid medications such as heroin and prodine), with an acscn of 9603 and a 2013 annual manufacturing quota of 2 grammes. not to be confused with acetylmethadol alphacetylmethadolclinical dataatc codenonelegal statuslegal status au: s8 (controlled drug) ca: schedule i de: anlage i (authorized scientific use only) us: schedule i identifiers iupac name acetate cas number17199-58-5pubchem cid22308chemspider20937uniibxf83s0helchemblchembl2107793comptox dashboard (epa)dtxsid70169198 chemical and physical dataformulac23h31no2molar mass353.506 g·mol−13d model (jsmol)interactive image smiles cc(c(c(c)n(c)c)(c1=cc=cc=c1)c2=cc=cc=c2)oc(=o)c inchi inchi=1s/c23h31no2/c1-6-22(26-19(3)25)23(17-18(2)24(4)5,20-13-9-7-10-14-20)21-15-11-8-12-16-21/h7-16,18,22h,6,17h2,1-5h3/t18-,22-/m1/s1key:xbmivrrwgcybtq-xmsqkqjnsa-n