69263-38-3
3,3-二乙氧基-2-乙基丙酸乙酯
+
119-26-6
2,4-二硝基苯肼
→
62142-28-3
ethyl 2-[[(2,4-dinitrophenyl)hydrazinylidene]methyl]butanoate
533-68-6
2-溴丁酸乙酯