CAS 28283-98-9 appears in our catalog under these names: 2,3-Dioxoindoline-5-carboxamide 97%, 2,3-Dioxoindoline-5-carboxamide, 97%, 97%, 2,3-DIOXOINDOLINE-5-CARBOXAMIDE, 97%. Offered by: Ambeed, Chemat, Fluorochem. Available pack sizes: 100mg, 250mg, 1g, 25mg.