tert-butyl 3-hydroxybutanoate

tert-butyl (3E)-3-[[6-(4-methylpiperazin-1-yl)pyridazin-3-yl]hydrazinylidene]butanoate

(1-methylcyclohexyl) 3-oxobutanoate

6-phenyloxane-2,4-dione

tert-butyl 3-acetyloxybut-2-enoate