Methyl 3-hydroxy-1-Methylpyrazole

METHYL 3-HYDROXY-1-METHYLPYRAZOLE-5-CARBOXYLATE

Methyl 3-hydroxy-1-Methyl-1H-pyrazole-4-carboxylate

1H-Pyrazole-3-carboxylic acid, 2,5-dihydro-2-Methyl-5-oxo-, Methyl ester