desocodeine desocodeine desocodeine is a semi-synthetic opioid which is the penultimate intermediate in the manufacture of desomorphine from codeine. synthesis of desomorphine from codeine desocodeine names iupac name 3-methoxy-17-methyl-4,5α-epoxymorphinan systematic iupac name (4r,4ar,7as,12bs)-9-methoxy-3-methyl-2,3,4,4a,5,6,7,7a-octahydro-1h-4,12-methanobenzofuroisoquinoline other names dihydrodeoxycodeine identifiers cas number 3990-01-0 y 3d model (jsmol) interactive image chemspider 4591151 pubchem cid 5492803 unii 4h4t7h4yks y comptox dashboard (epa) dtxsid70960440 inchi inchi=1s/c18h23no2/c1-19-9-8-18-12-4-3-5-15(18)21-17-14(20-2)7-6-11(16(17)18)10-13(12)19/h6-7,12-13,15h,3-5,8-10h2,1-2h3/t12-,13+,15-,18+/m0/s1key: zjwpqusuxbotpf-scgcmhlbsa-ninchi=1/c18h23no2/c1-19-9-8-18-12-4-3-5-15(18)21-17-14(20-2)7-6-11(16(17)18)10-13(12)19/h6-7,12-13,15h,3-5,8-10h2,1-2h3/t12-,13+,15-,18+/m0/s1key: zjwpqusuxbotpf-scgcmhlbbv smiles o(c2c1o534c1c(cc2)c(n(cc3)c)4ccc5)c properties chemical formula c18h23no2 molar mass 285.387 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references