CAS 39499-34-8 appears in our catalog under these names: 5-Methylisoxazole-3-carbonyl chloride, 97%, 5–Methylisoxazole–3–carbonyl chloride, 5-Methylisoxazole-3-carbonyl chloride, 98% , 5-Methylisoxazole-3-carbonyl chloride, 97% , 5-Methylisoxazole-3-carbonyl chloride 98%. Offered by: Combi-blocks, GLPBio, Thermo Scientific (Alfa Aesar), Thermo Scientific, Ambeed. Available pack sizes: 1g, 25g, 100g, 5g, 10g.