CAS 42558-54-3 appears in our catalog under these names: Methyl 4–methyl–3–oxovalerate, Methyl 4-methyl-3-oxopentanoate, Methyl 4-methyl-3-oxovalerate 95%, Methyl 4-methyl-3-oxopentanoate (Standard), Methyl 4-methyl-3-oxopentanoate, 95%. Offered by: GLPBio, Biosynth, Ambeed, MedChemExpress, Fluorochem. Available pack sizes: 100g, 500g, 0,1kg, 0,25kg, 0,5kg, 1kg, 2kg, 10g.