4,4,4,4- (1,1,2,2-Ethenetetrayl) Tetrakis (Biphenyl-3,5-Dicarboxylic Acid)

O=C (C1=CC (C (O) =O) =CC (C2=CC=C (C (C3=CC=C (C4=CC (C (O) =O) =CC (C (O) =O) =C4) C=C3) =C (C5=CC=C (C6=CC (C (O) =O) =CC (C (O) =O) =C6) C=C5) C7=CC=C (C8=CC (C (O) =O) =CC (C (O) =O) =C8) C=C7) C=C2) =C1) O