4,4'-Methylenedibenzoic acid bis(2-diethylaminoethyl) ester hydrochloride Benzoic acid, 4,4'-methylenedi-, bis(2-diethylaminoethyl) ester, hydrochloride Bis(diethylaminoethyl) 4,4'-diphenylmethanedicarboxylate hydrochloride DH3848000