zenazocine zenazocine zenazocine (inn; win-42,964) is an opioid analgesic of the benzomorphan family which made it to phase ii clinical trials before development was ultimately halted and it was never marketed. it acts as a partial agonist of the μ- and δ-opioid receptors, with less intrinsic activity at the former receptor and more at the latter receptor (hence, it behaves more antagonistically at the former and more agonistically at the latter), and produces antinociceptive effects in animal studies. zenazocineclinical dataatc codenonelegal statuslegal status in general: non-regulated identifiers iupac name 1-trideca-2,4,6-trien-13-yl]-6-methyl-3-heptanone cas number74559-85-6pubchem cid9885108chemspider8060782unii8wil6l9u01comptox dashboard (epa)dtxsid20996077 chemical and physical dataformulac23h35no2molar mass357.538 g·mol−13d model (jsmol)interactive image smiles o=c(ccc(c)c)ccc3(2n(cc3(c1c(ccc(o)c1)c2)c)c)c inchi inchi=1s/c23h35no2/c1-16(2)6-8-18(25)10-11-23(4)21-14-17-7-9-19(26)15-20(17)22(23,3)12-13-24(21)5/h7,9,15-16,21,26h,6,8,10-14h2,1-5h3/t21-,22+,23?/m1/s1key:jzfzewwoioybtq-axwgzafasa-n