0 B12R2.246 NC1=NC(=O)C2=C(N=CN2)N1 YMDB00698 [2,0,0,0,0,0|1,0,1]=4 1 B12R2.246 O=C1NC(=O)C2=C(N=CN2)N1 YMDB00263 [2,0,0,0,0,0|0,0,0]=2