narceine narceine narceine is an opium alkaloid produced by the papaver somniferum (opium poppy) plant. it is a bitter, crystalline compound with narcotic effects. it was formerly used as a substitute for morphine. its name is derived from the greek νάρκη (nárkē), meaning numbness, and the postfix -ine referring to an alkaloid. narceine names preferred iupac name 6-(acetyl)-2,3-dimethoxybenzoic acid identifiers cas number 131-28-2 3d model (jsmol) interactive image chemspider 8246 echa infocard 100.004.566 ec number 235-480-2 kegg c09591 pubchem cid 8564 unii ctt09x2f1m comptox dashboard (epa) dtxsid40156833 inchi inchi=1s/c23h27no8/c1-24(2)9-8-13-10-18-22(32-12-31-18)20(29-4)15(13)11-16(25)14-6-7-17(28-3)21(30-5)19(14)23(26)27/h6-7,10h,8-9,11-12h2,1-5h3,(h,26,27)key: dexmfyzahxmznm-uhfffaoysa-ninchi=1/c23h27no8/c1-24(2)9-8-13-10-18-22(32-12-31-18)20(29-4)15(13)11-16(25)14-6-7-17(28-3)21(30-5)19(14)23(26)27/h6-7,10h,8-9,11-12h2,1-5h3,(h,26,27)key: dexmfyzahxmznm-uhfffaoyaj smiles cn(c)ccc1=cc2=c(c(=c1cc(=o)c3=c(c(=c(c=c3)oc)oc)c(=o)o)oc)oco2 properties chemical formula c23h27no8 molar mass 445.468 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references