noracymethadol noracymethadol noracymethadol (inn) is a synthetic opioid analgesic related to methadone that was never marketed. in a clinical trial of postpartum patients it was reported to produce analgesia comparable to that of morphine but with less nausea, dizziness, and drowsiness. other side effects included salivation, ataxia, and respiratory depression that was reversible by naloxone. similarly to many of its analogues, noracymethadol is a schedule i controlled substance in the united states with an acscn of 9633 and 2013 annual manufacturing quota of 12 grammes. and is also controlled internationally under the united nations single convention on narcotic drugs of 1961. the salts known are the gluconate (free base conversion ratio 0.633) and hydrochloride (0.903). noracymethadolclinical dataatc codenonelegal statuslegal status ca: schedule i de: anlage i (authorized scientific use only) us: schedule i identifiers iupac name 6-(methylamino)-4,4-diphenyl-3-heptanyl acetate cas number1477-39-0 5633-25-0 (hydrochloride)7645-01-4 (gluconate)pubchem cid15129chemspider14400uniiku5u13xy7jecha infocard100.014.571 chemical and physical dataformulac22h29no2molar mass339.479 g·mol−13d model (jsmol)interactive image smiles o=c(oc(c(c1ccccc1)(c2ccccc2)cc(nc)c)cc)c inchi inchi=1s/c22h29no2/c1-5-21(25-18(3)24)22(16-17(2)23-4,19-12-8-6-9-13-19)20-14-10-7-11-15-20/h6-15,17,21,23h,5,16h2,1-4h3key:vwcugcyzzgrkee-uhfffaoysa-n noracymethadol is an acetyl ester of methadol and it can be said with some precision that it is either the heroin or 6-monoacetylmorphine analogue of methadol, and being a methadol it exhibits optical isomerism. the other methadols (acetylmethadol, methadol &c) have at least four optical isomers (see orlaam).