CAS 57111-85-0 appears in our catalog under these names: 4-(5,7-Dioxo-5,7-dihydro-6h-pyrrolo[3,4-b]pyridin-6-yl)butanoic acid, 95%, 4-(5,7-Dioxo-5H-pyrrolo(3,4-b)pyridin-6(7H)-yl)butanoic acid, 97%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 250mg, 5g, 1g.