butinazocine butinazocine butinazocine (inn) is an opioid analgesic of the benzomorphan family which was never marketed. butinazocineclinical dataatc codenoneidentifiers iupac name 10-(3-butyn-1-yl)-13,13-dimethyl-10-azatricyclotrideca-2,4,6-triene-1,4-diol cas number93821-75-1 79810-24-5 (hydrochloride)pubchem cid189903chemspider164930uniiw11et455zichemblchembl2106183chemical and physical dataformulac18h23no2molar mass285.387 g·mol−13d model (jsmol)interactive image smiles oc1=cc=c2c(3(c(c)(c)(c2)n(cc3)ccc#c)o)=c1 inchi inchi=1s/c18h23no2/c1-4-5-9-19-10-8-18(21)15-12-14(20)7-6-13(15)11-16(19)17(18,2)3/h1,6-7,12,16,20-21h,5,8-11h2,2-3h3key:yeffviuqxxnvgg-uhfffaoysa-n