anhydro-1-hydroxy-3-methyl-4-(methoxycarbonyl)-s-triazolo[4,3-a]quinoxalinium hydroxide

(2,4-dioxo-1H-benzo[g]pteridin-3-yl) benzenesulfonate

4-(hydrazinecarbonyl)-3-methyl-1-oxo-1H-[1,2,4]triazolo[4,3-a]quinoxalin-3-ium-2-ide

3,3-dihydroxy-1,5-dihydro-1,5-benzodiazepine-2,4-dione

1-methyl-3-benzenesulfonyloxyalloxazine