4-amino-1H-pyrido[2,3-d]pyrimidine-2-thione

吡啶并[2,3-d]嘧啶-4(3H)-酮

4-amino-2-chloropyrido[2,3-d]pyrimidine

1H-pyrido[2,3-d]pyrimidine-2,4-dithione

2-氨基-N-羟基-3-吡啶羧酰胺