anilopam anilopam anilopam (inn; pr 786-723) is an opioid analgesic of the benzazepine class which was developed by pentwell in the 1960s but was never marketed. anilopamclinical dataatc codenonelegal statuslegal status unregulated identifiers iupac name 4-aniline cas number53716-46-4 53716-45-3 (hydrochloride)pubchem cid166550chemspider145753unii34e9q468rtchemblchembl2110599chemical and physical dataformulac20h26n2omolar mass310.441 g·mol−13d model (jsmol)interactive image smiles cc(n(ccc1=cc=c(n)c=c1)cc2)cc3=c2c=cc(o)=c3