Synonyms: Norpropoxyphene;1,2-Diphenyl-3-methyl-4-(methylamino)-2-butanol propionate (ester);1,2-Diphenyl-4-(methylamino)-3-methyl-2-butanol propionate (ester);2-BUTANOL, 1,2-DIPHENYL-4-(METHYLAMINO)-3-METHYL-, PROPIONATE (ester);2-BUTANOL, 1,2-DIPHENYL-3-METHYL-4-(METHYLAMINO)-, PROPIONATE (ESTER);3376-94-1;AC1L2CU3;LS-46530;LS-46531;[3-methyl-4-(methylamino)-1,2-diphenylbutan-2-yl] propanoate;1,2-Diphenyl-4-(methylamino)-3-methyl-2-butanol propionate;3-methyl-4-(methylamino)-1,2-diphenylbutan-2-yl propanoate;2-Butanol, 1,2-diphenyl-4-(methylamino)-3-methyl-, propionate;66796-40-5