CAS 7251-53-8 appears in our catalog under these names: Ethyl 3-hydroxy-1H-pyrazole-4-carboxylate, Ethyl 5-hydroxy-4-pyrazolecarboxylate 98%, Ethyl 3-hydroxy-1H-pyrazole-4-carboxylate, 98%, 98%, 3-Hydroxy-1H-pyrazole-4-carboxylic acid ethyl ester, 97%, Ethyl 3-oxo-2,3-dihydro-1H-pyrazole-4-carboxylate, 97%. Offered by: Biosynth, Ambeed, Chemat, Fluorochem. Available pack sizes: 25g, 2,5g, 250mg, 1g, 5g, 10g, 100g, 100mg.