CAS 39757-29-4 appears in our catalog under these names: Methyl 4-(4-methylphenyl)-2,4-dioxobutanoate, 95%, Methyl (2z)-2-hydroxy-4-(4-methylphenyl)-4-oxobut-2-enoate, 95%, Methyl (2z)-2-hydroxy-4-(4-methylphenyl)-4-oxobut-2-enoate, 97%, 97%. Offered by: Combi-blocks, Chemat. Available pack sizes: 5g, 1g, 250mg, 10g, 25g, 100mg.