CAS 268204-00-8 appears in our catalog under these names: Sildenafil impurity 12, 4–Amino–1–methyl–3–(2–methylpropyl)–1H–pyrazole–5–carboxamide, 4-Amino-1-methyl-3-(2-methylpropyl)-1H-pyrazole-5-carboxamide, 4-Amino-1-methyl-3-(2-methylpropyl)-1H-pyrazole-5-carboxamide 95%, 4-Amino-1-methyl-3-(2-methylpropyl)-1H-pyrazole-5-carboxamide, 95%, 95%. Offered by: Dr. Ehrenstorfer, GLPBio, Biosynth, Ambeed, Chemat. Available pack sizes: 25mg, 50mg, 1g, 100mg, 250mg, Get quote.