4-methyl-4,5-dihydro-3(2H)-pyridazinone

N-allyl-N'-methacryloyl-4-methylbenzenesulfonohydrazide

2,3-dihydro-4-methyl-3-oxopyridazine-6-carboxylic acid

5-hydroxy-4-methyloxolan-2-one

ethyl 2-methyl-4,4-diethoxybutanoate