81711-62-8
Butanedioic acid, 2-(2-phenylhydrazinylidene)-, 1,4-diethyl ester
→
60872-15-3
5-ethoxy-1-phenylpyrazole-3-carboxylic acid
49597-17-3
5-氧代-1-苯基-2,5-二氢-1H-吡唑-3-羧酸