638-07-3
4-氯乙酰乙酸乙酯
+
56830-58-1
2,5-二氨基-4,6-二羟基嘧啶盐酸盐
→
73217-06-8
ethyl (2E)-2-(2-amino-4-oxo-3,5-dihydropyrimido[4,5-b][1,4]oxazin-6-ylidene)acetate
73217-08-0
ethyl 4-[[(1Z)-1-(2-amino-4-oxo-3,5-dihydropyrimido[4,5-b][1,4]oxazin-6-ylidene)-2-ethoxy-2-oxoethyl]amino]benzoate