pseudomorphine pseudomorphine pseudomorphine (also known as oxydimorphine or dehydromorphine) is an inactive, natural dimerisation product of the morphine molecule in tandem and thus a common impurity in morphine concentrations. it was first described by pelletier in 1835. "dehydromorphine" redirects here. not to be confused with dihydromorphine. pseudomorphine names iupac name (5α,6α)-2--17-methyl-7,8-didehydro-4,5-epoxymorphinan-3,6-diol identifiers cas number 125-24-6 y 3d model (jsmol) interactive image abbreviations 2,2'-bimorphine chemspider 4590027 y echa infocard 100.169.464 pubchem cid 234570 unii aez78qx2g7 comptox dashboard (epa) dtxsid50924984 inchi inchi=1s/c34h36n2o6/c1-35-9-7-33-19-3-5-23(37)31(33)41-29-25(33)15(13-21(19)35)11-17(27(29)39)18-12-16-14-22-20-4-6-24(38)32-34(20,8-10-36(22)2)26(16)30(42-32)28(18)40/h3-6,11-12,19-24,31-32,37-40h,7-10,13-14h2,1-2h3key: fojyfdfngprxdr-uhfffaoysa-n smiles cn1ccc23c4c1cc5=c2c(=c(c(=c5)c6=cc7=c8c(=c6o)oc9c81ccn(c(c7)c1c=cc9o)c)o)oc3c(c=c4)o properties chemical formula c34h36n2o6 molar mass 568.670 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references this compound may be synthesized by the oxidative coupling of morphine by potassium ferricyanide. pseudomorphine contributes very little to morphine's effects. it produces no effects in the central nervous or gastrointestinal systems, but it might have some effects on the circulatory system.