10475-63-5
3-氧代-2-(2-苯基亚肼基)丁酸乙酯
→
39683-24-4
ethyl 4-hydroxy-1-phenylpyrazole-3-carboxylate
39683-28-8
4-bromo-3-oxo-2-phenylhydrazono-butyric acid ethyl ester