0 B21R2.257631 O=C(CCC1=CC=CC=C1)/C=C/CCC2=CC=CC=C2 HMDB0031873 [0,0,0,0,0,0|1,0,3]=4 1 B19R2.8899 O=C(OC/C=C/C1=CC=CC=C1)C2=CC=CC=C2 HMDB0029700 [0,0,0,0,2,0|0,0,2]=4