3737-72-2 BENZOIC ACID, p-(2-((DIETHYLAMINO)METHYL)BUTOXY)-, p-METHOXYPHENYL ESTER, HYDROC Benzoic acid, p-(2-((diethylamino)methyl)butoxy)-, p-methoxyphenyl ester, hydrochloride U-0290 p-(2-((Diethylamino)methyl)butoxy)benzoic acid p-methoxyphenyl ester hydrochloride