dimepheptanol dimepheptanol dimepheptanol (inn; amidol, pangerin), also known as methadol or racemethadol, is a synthetic opioid analgesic related to methadone. it has similar effects to other opioids, including analgesia, sedation and euphoria, as well as side effects like itching, nausea and respiratory depression. not to be confused with oxymetholone. dimepheptanolclinical dataatc codenonelegal statuslegal status au: s9 (prohibited substance) ca: schedule i de: anlage i (authorized scientific use only) us: schedule i identifiers iupac name 6-(dimethylamino)-4,4-diphenylheptan-3-ol cas number545-90-4pubchem cid28397uniinnb4i01pa7chemblchembl368591comptox dashboard (epa)dtxsid40110031 chemical and physical dataformulac21h29nomolar mass311.469 g·mol−13d model (jsmol)interactive image smiles ccc(c(cc(c)n(c)c)(c1=cc=cc=c1)c2=cc=cc=c2)o inchi inchi=1s/c21h29no/c1-5-20(23)21(16-17(2)22(3)4,18-12-8-6-9-13-18)19-14-10-7-11-15-19/h6-15,17,20,23h,5,16h2,1-4h3key:qiraynifeoxspw-uhfffaoysa-n (verify) dimepheptanol is a mixture of two isomers, alphamethadol (α-methadol) and betamethadol (β-methadol). these are also available separately, and this drug has three separate entries in many national and international lists of illegal drugs, which refer to the racemic mixture dimepheptanol, and the two optical isomers. each of these isomers is itself a mixture of two isomers, and so there are in fact four isomers of dimepheptanol in total; l-α-methadol, d-α-methadol, l-β-methadol and d-β-methadol. the isomer l-α-methadol is the active metabolite of the long-acting opioid substitute drug levomethadyl acetate (laam), and has been used much more widely than β-methadol or the racemic mixture of dimepheptanol. both in us controlled substances act 1970 schedule i, the two isomers both have annual manufacturing quotas of 2 grammes and the acscns of 9605 for alphamethadol and 9609 for betamethadol.