[1,1′-BIPHENYL]-4,4′-DIAMINE, N4,N4,N4′,N4′-TETRAKIS([1,1′-BIPHENYL]-4-YL)- – (164724-35-0)

C1=CC=C(C=C1)P(=O)(C2=CC=CC=C2)C3=CC=CC(=C3)C4=NC(=NC(=N4)C5=CC(=CC=C5)P(=O)(C6=CC=CC=C6)C7=CC=CC=C7)C8=CC(=CC=C8)P(=O)(C9=CC=CC=C9)C1=CC=CC=C1