1-(8-cyclopentyl-2,6-dioxo-1-propyl-7H-purin-3-yl)propan-2-yl 2-bromoacetate
[2-(8-cyclopentyl-2,6-dioxo-1-propyl-7H-purin-3-yl)-1-methyl-ethyl] 2-bromoacetate
2-bromoacetic acid [2-(8-cyclopentyl-2,6-dioxo-1-propyl-7H-purin-3-yl)-1-methylethyl] ester
2-bromoacetic acid [2-(8-cyclopentyl-2,6-diketo-1-propyl-7H-purin-3-yl)-1-methyl-ethyl] ester
1-(8-cyclopentyl-2,6-dioxo-1-propyl-7H-purin-3-yl)propan-2-yl 2-bromoethanoate