1,2,4,5-Benzenetetracarboxylic acid, diethyl ester, comp. with 4,4'-((1,1'-biphenyl)-2,5-diylb 1,2,4,5-Benzenetetracarboxylic acid, diethyl ester, compd. with 4,4'-((1,1'-biphenyl)-2,5-diyl 158965-44-7