4,4'-Trimethylenedibenzoic acid bis(2-diethylaminoethyl) ester hydrochloride Benzoic acid, 4,4'-trimethylenedi-, bis(2-diethylaminoethyl) ester, hydrochloride Bis(diethylaminoethyl) 4,4'-diphenyl-1,3-propanedicarboxylate hydrochloride DI0894500