2-ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine 2-ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine 2-ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine (eddp) is a major metabolite of methadone. eddp names iupac name 2-ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine identifiers cas number 30223-73-5 y 3d model (jsmol) interactive image chemspider 4526936 pubchem cid 5378015 unii z3lc48u94i y comptox dashboard (epa) dtxsid10880951 inchi inchi=1s/c20h23n/c1-4-19-20(15-16(2)21(19)3,17-11-7-5-8-12-17)18-13-9-6-10-14-18/h4-14,16h,15h2,1-3h3/b19-4-key: ajrjporiqgyfmt-pvovumcxsa-n smiles cc=c1c(cc(n1c)c)(c2=cc=cc=c2)c3=cc=cc=c3 properties chemical formula c20h23n molar mass 277.411 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references