3,3'-BIPHENYLDICARBOXYLIC ACID, 6,6'-DIAMINO-, BIS-(2-DIETHYLAMINOETHYL) ESTER, 3,3'-Biphenyldicarboxylic acid, 6,6'-diamino-, bis-(2-diethylaminoethyl) ester, hydrochloride 63992-37-0 Di-(beta-diethylaminoethyl)-2,2'-diamino-5,5'-biphenylcarboxylate hydrochloride