0 B15R2.2226 O=C(C1=CC=CC=C1)C2=CC=CC=C2 DB01878 [1,0,0,0,0,0|0,0,2]=3 1 B18R2.1673 COC1=CC(O)=C(C=C1)C(=O)C2=CC=CC=C2 DB01428 [0,2,0,0,0,0|0,0,2]=4