CAS 1638764-31-4 appears in our catalog under these names: Methyl 1-methyl-2-oxo-3H-indole-6-carboxylate, 98%, Methyl 1-methyl-2-oxo-3H-indole-6-carboxylate, 97%, 97%, Indobufen impurity 2, 97.0%, Indobufen impurity 2 (Standard), methyl 1-methyl-2-oxo-2,3-dihydro-1H-indole-6-carboxylate, 98%. Offered by: Combi-blocks, Chemat, MedChemExpress, Fluorochem. Available pack sizes: 5g, 1g, 250mg, 100mg, 10g, 25g, 500mg, 500 mg.