CAS 874773-50-9 appears in our catalog under these names: 5-Cyclopropyl-2-methyl-2,4-dihydro-3H-pyrazol-3-one, 97%, 97%, 5-Cyclopropyl-2-methyl-2,4-dihydro-3H-pyrazol-3-one, 98%. Offered by: Chemat, Fluorochem. Available pack sizes: 100mg, 250mg, 1g.