6-morpholin-4-yl-7-nitro-1,4-dihydropyrido[5,6-e]pyrazine-2,3-dione
6-morpholino-7-nitro-1,4-dihydropyrido[5,6-e]pyrazine-2,3-dione
6-morpholino-7-nitro-1,4-dihydropyrido[5,6-e]pyrazine-2,3-quinone