cloniprazepam cloniprazepam cloniprazepam is a benzodiazepine derivative and a prodrug of clonazepam, 7-aminoclonazepam, and other metabolites. not to be confused with clonazepam, clonazolam, or clorazolam. cloniprazepamclinical dataother names1-cyclopropylmethylclonazepam, kloniprazepam, 2-chloro-7'-nitroprazepamdrug classbenzodiazepineslegal statuslegal status ca: schedule iv de: npsg (industrial and scientific use only) uk: under psychoactive substances act identifiers iupac name 5-(2-chlorophenyl)-1-(cyclopropylmethyl)-7-nitro-1,3-dihydro-2h-benzodiazepin-2-one cas number1998158-84-1 ypubchem cid137700140chemspider68003855uniiysl4sm8qypcomptox dashboard (epa)dtxsid60893511 chemical and physical dataformulac19h16cln3o3molar mass369.81 g·mol−13d model (jsmol)interactive image smiles o=c1n(cc2cc2)c3=cc=c(()=o)c=c3c(c4=cc=cc=c4cl)=nc1 inchi inchi=1s/c19h16cln3o3/c20-16-4-2-1-3-14(16)19-15-9-13(23(25)26)7-8-17(15)22(11-12-5-6-12)18(24)10-21-19/h1-4,7-9,12h,5-6,10-11h2key:ccsykgylsfxnta-uhfffaoysa-n metabolic pathway of cloniprazepam some of the minor metabolites include 3-hydroxyclonazepam and 6-hydroxyclonazepam, 3-hydroxycloniprazepam and ketocloniprazepam with ketone group formed where 3-hydroxy group was. it is a designer drug and an nps (short for "new psychoactive substance"). at the end of 2017, cloniprazepam was an uncontrolled substance in most of the countries.