mesyl glycine m-nitrophenyl ester

(2R,3S,4R,5R)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-hydroxy-2-(hydroxymethyl)tetrahydrofuran-3-yl (3-nitrophenyl) hydrogen phosphate

3-nitrophenyl 4-(1,3-dimethyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl)benzenesulfonate

3-nitrophenyl 4-(1-methyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl)benzenesulfonate

3-nitrophenyl 4-(2,6-dioxo-1-propyl-2,3,6,7-tetrahydro-1H-purin-8-yl)benzenesulfonate