pinoxepin pinoxepin pinoxepin (inn; developmental code name p-5227; pinoxepin hydrochloride (usan)) is an antipsychotic of the tricyclic group with a dibenzoxepin ring system which was developed in the 1960s but was never marketed. it was found in clinical trials to have effectiveness in the treatment of schizophrenia similar to that of chlorpromazine and thioridazine. the drug has marked sedative effects but causes relatively mild extrapyramidal symptoms. pinoxepinclinical dataother namespinoxepine; p-5227routes ofadministrationoralidentifiers iupac name 2-benzoxepin-11-ylidene)propyl]piperazin-1-yl]ethanol cas number14008-66-3 14008-46-9 (hydrochloride)pubchem cid6436541chemspider4941168uniiy3yko9x8n8chemblchembl2110968chemical and physical dataformulac23h27cln2o2molar mass398.93 g·mol−13d model (jsmol)interactive image smiles c1cn(ccn1cc/c=c\2/c3=cc=cc=c3coc4=c2c=c(c=c4)cl)cco inchi inchi=1s/c23h27cln2o2/c24-19-7-8-23-22(16-19)21(20-5-2-1-4-18(20)17-28-23)6-3-9-25-10-12-26(13-11-25)14-15-27/h1-2,4-8,16,27h,3,9-15,17h2/b21-6-key:raahiuirjuomau-mpucswfwsa-n