0 B11R2.106 NC1=C2NC=NC2=NC=N1 DB00173 [0,1,0,0,0,0|2,0,0]=3 1 B11R2.106 S=C1N=CNC2=C1NC=N2 DB01033 [0,1,0,0,0,0|2,0,1]=4