N-(1-hydroxy-2-methylpropan-2-yl)-3-oxobutanamide

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

5,7-二氯-4-羟基-2-甲基喹啉

ethyl 3-cyanobutanoate

ethyl (2E)-2-[(4-chlorophenyl)hydrazinylidene]-3-oxobutanoate