CAS 131570-34-8 appears in our catalog under these names: 3-(5,7-Dioxo-5,7-dihydro-6h-pyrrolo[3,4-b]pyridin-6-yl)propanoic acid, 95%, 3-(5,7-Dioxo-5H-pyrrolo(3,4-b)pyridin-6(7H)-yl)propanoic acid, 98%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 250mg, 1g, 5g, 10g.