1,2,3,4-Tetrahydro-6-nitro-2,3-dioxobenzo(f)quinoxaline-8-sulfonamide 118876-58-7 2,3-Dihydroxy-6-nitro-7-sulfamoyl-benzo(f)quinoxaline 2,3-Dioxo-6-nitro-7-sulfamoylbenzo(f)quinoxaline 6-Nitro-7-sulfamoylbenzo(f)quinoxaline-2,3-dione Benzo(f)quinoxaline-7-sulfonamide, 1,2,3,4-tetrahydro-6-nitro-2,3-dioxo- FG 9202 NBQX