[1,1'-Biphenyl]-2,3,3',4'-tetracarboxylicacid, tetramethyl ester (9CI); 2,3,3',4'-Biphenyltetracarboxylic acidtetramethyl ester; Tetramethyl 1,1'-biphenyl-2,3,3',4'-tetracarboxylate;Tetramethyl 2,3,3',4'-biphenyltetracarboxylate
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