1-<(2-hydroxyethoxy)methyl>-6-(phenylselenenyl)-5-bromouracil
5-Bromo-1-(2-hydroxy-ethoxymethyl)-6-phenylsulfanyl-1H-pyrimidine-2,4-dione
5-Bromo-1-[2-(tert-butyl-dimethyl-silanyloxy)-ethoxymethyl]-6-phenylsulfanyl-1H-pyrimidine-2,4-dione
1-<<2-<(tert-butyldimethylsilyl)oxy>ethoxy>methyl>-6-(phenylselenenyl)-5-bromouracil