eptazocine eptazocine eptazocine (sedapain) is an opioid analgesic which was introduced in japan by morishita in 1987. it acts as a mixed κ-opioid receptor agonist and μ-opioid receptor antagonist. eptazocineclinical dataroutes ofadministrationoralatc codenonelegal statuslegal status in general: ℞ (prescription only) identifiers iupac name (1s,6s)-1,4-dimethyl-2,3,4,5,6,7-hexahydro-1h-1,6-methano-4-benzazonin-10-ol cas number72522-13-5 72150-17-5 (bromide)pubchem cid3042090chemspider2305268unii2208zli77schemblchembl70566chemical and physical dataformulac15h21nomolar mass231.339 g·mol−13d model (jsmol)interactive image smiles oc1ccc2c(c1)3(ccn(c(c2)c3)c)c inchi inchi=1s/c15h21no/c1-15-5-6-16(2)10-11(9-15)7-12-3-4-13(17)8-14(12)15/h3-4,8,11,17h,5-7,9-10h2,1-2h3/t11-,15-/m1/s1key:zowqtjxnftwscs-iaqyhmdhsa-n