53570-67-5 8056-22-2 Benzoic acid, 2-(acetyloxy)-, mixt. with 3,7-dihydro-1,3,7-trimethyl-1H-purine-2,6-dione, (S-(R*,S*))-3-(dimethylamino)-2-methyl-1-(phenylmethyl)propyl propanoate hydrochloride and N-(4-ethoxyphenyl)acetamide Darvon compound 65