1,2-benzenedicarboxylic acid, 4,4'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene]bis-, 1,1'-diethyl ester;3,3'-(1,1,1,3,3,3-Hexafluoropropane-2,2-diyl)bis[6-(ethoxycarbonyl)benzoic acid]
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