5418-94-0
2-氯-4H-吡啶并[1,2-a]嘧啶-4-酮
→
~71%
55395-30-7
ethyl 2-hydrazinothiazole-4-carboxylate
22288-66-0
2H-吡啶并[1,2-a]嘧啶-2,4(3H)-二酮
23443-10-9
pyrido[1,2-a]pyrimidin-4-one