m320 (opioid) m320 (opioid) m320 is an extremely potent and long acting opioid. it produces long lasting narcosis in different animals, including mice, rats, cats, guinea pigs, dogs and monkeys. m320 is a μ and κ-opioid receptor agonist. m320 (opioid)clinical dataother names(5α,6β,14β,18r)-17-(cyclopropylmethyl)-18--6-methoxy-7,8-didehydro-18,19-dihydro-4,5-epoxy-6,14-ethenomorphinan-3-olatc codenonelegal statuslegal status uk: under psychoactive substances act identifiers iupac name (1r,2s,6r,14r,15r,19r)-5-(cyclopropylmethyl)-19--15-methoxy-13-oxa-5-azahexacycloicosa-8(20),9,11,16-tetraen-11-ol pubchem cid71717732chemspider29420445chemblchembl2338714chemical and physical dataformulac30h41no4molar mass479.661 g·mol−13d model (jsmol)interactive image smiles cc(c)cc(c)(1c23c=c1(425ccn(3cc6=c5c(=c(c=c6)o)o4)cc7cc7)oc)o inchi inchi=1s/c30h41no4/c1-18(2)9-10-27(3,33)22-16-28-11-12-30(22,34-4)26-29(28)13-14-31(17-19-5-6-19)23(28)15-20-7-8-21(32)25(35-26)24(20)29/h7-8,11-12,18-19,22-23,26,32-33h,5-6,9-10,13-17h2,1-4h3/t22-,23-,26-,27-,28-,29+,30-/m1/s1key:mfiwlpvodksmkx-xeldogjxsa-n