codeine-n-oxide codeine-n-oxide codeine-n-oxide (genocodeine) is an active metabolite of codeine. it is an opiate listed as a schedule i controlled substance. it has a dea acscn of 9053 and its annual manufacturing quota for 2013 was 602 grams. codeine-n-oxide names systematic iupac name (1s,4s,5r,13r,14s,17r)-10-methoxy-4-methyl-12-oxa-4-azapentacyclooctadeca-7(18),8,10,15-tetraen-14-ol 4-oxide identifiers cas number 3688-65-1 y 3d model (jsmol) interactive image chemspider 4514400 echa infocard 100.020.899 pubchem cid 5359929 unii z32ofx7v17 y comptox dashboard (epa) dtxsid00190359 inchi inchi=1s/c18h21no4/c1-19(21)8-7-18-11-4-5-13(20)17(18)23-16-14(22-2)6-3-10(15(16)18)9-12(11)19/h3-6,11-13,17,20h,7-9h2,1-2h3/t11-,12+,13-,17-,18-,19-/m0/s1key: bdlsdhwcojphie-kfugmxnisa-ninchi=1/c18h21no4/c1-19(21)8-7-18-11-4-5-13(20)17(18)23-16-14(22-2)6-3-10(15(16)18)9-12(11)19/h3-6,11-13,17,20h,7-9h2,1-2h3/t11-,12+,13-,17-,18-,19-/m0/s1key: bdlsdhwcojphie-kfugmxnibr smiles 4(3cc5c1c(o21(3/c=c\2o)cc4)c(oc)cc5)c properties chemical formula c18h21no4 molar mass 315.369 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references like morphine-n-oxide, it was studied as a potential pharmaceutical drug and is considerably weaker than codeine. the amine oxides of this type form as oxidation products of the parent chemical; virtually every morphine/codeine class opioid has an equivalent nitrogen derivative such as hydromorphone-n-oxide.