异烟肼

N-acetoacetylphenylhydroxyloamine

3-Oxobutanethioic acid S-ethyl ester

ethyl (3E)-3-[[2-[(2E)-2-(4-ethoxy-4-oxobutan-2-ylidene)hydrazinyl]-2-oxoacetyl]hydrazinylidene]butanoate

ethyl acetoacetate (Z)-semicarbazone