1007476-32-5
sodium acetyl acetic acid ethyl ester
+
3717-25-7
2-nitro-benzaldehyde oxime
→
91956-03-5
ethyl 5-methyl-3-(2-nitrophenyl)-1,2-oxazole-4-carboxylate
35447-75-7
邻硝基苯并氢氯化肟
141-97-9
乙酰乙酸乙酯