CC=1C=CC=C(C=1)P(=O)(C2=CC=CC=C2)C3=CC=CC=C3 0.506984016 CC=1C=CC=CC=1P(=O)(C2=CC=CC=C2)C3=CC=CC=C3 0.5 O=P(CC1=CC=CC=C1)(C2=CC=CC=C2)C3=CC=CC=C3 0.504018001 CC1=CC=C(C=C1)P(=O)(C2=CC=CC=C2)C3=CC=CC=C3 0.50848894