CAS 64377-78-2 appears in our catalog under these names: 2,3-Dimethyl-1,4-dioxo-1,2,3,4-tetrahydrophthalazine-6-carboxylic acid, 95%, 2,3-Dimethyl-1,4-dioxo-1,2,3,4-tetrahydrophthalazine-6-carboxylic acid, 97%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 250mg, 5g, 1g.