rac-1-Ethyl-4-(3-isopropoxyphenyl)-3,4-dimethyl-1,2,3,4-tetrahydropyridine is an analogue of (rac)-1-Ethyl-4-(3-isopropoxyphenyl)-3-methyl-1,2,3,6-tetrahydropyridine (E917845), which s used in the synthesis of trans-3,4-dimethyl-4-(3-hydroxyphenyl)piperidine, an opioid antagonist.