CAS 77168-80-0 appears in our catalog under these names: 5,6-Dihydroxypyrazine-2-carboxylic acid, 98%, 5,6-dihydroxypyrazine-2-carboxylic acid, 97%, 97%, 5-hydroxy-6-oxo-1,6-dihydropyrazine-2-carboxylic acid, 97%, 5,6-Dioxo-1,4,5,6-tetrahydropyrazine-2-carboxylic acid, 97%. Offered by: AmBeed, Chemat, Fluorochem. Available pack sizes: 1g, 100mg, 250mg.