39400-85-6 51059-33-7 Acetamide, N-(4-hydroxyphenyl)-, mixt. with (S-(R*,S*))-3-(dimethylamino)-2-methyl-1-phenyl-1-(phenylmethyl)propyl propanoate hydrochloride Darvocet-N Distalgesic co-Proxamol di-Antalvic