[(2R,3S,5R)-2-[(tert-butyl-dimethylsilyl)oxymethyl]-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-3-yl] acetate;[(2R,3S,5R)-2-[(tert-butyl-dimethyl-silyl)oxymethyl]-5-(5-methyl-2,4-dioxo-pyrimidin-1-yl)tetrahydrofuran-3-yl] acetate;acetic acid [(2R,3S,5R)-2-[(tert-butyl-dimethylsilyl)oxymethyl]-5-(5-methyl-2,4-dioxo-1-pyrimidinyl)-3-tetrahydrofuranyl] ester;acetic acid [(2R,3S,5R)-2-[(tert-butyl-dimethyl-silyl)oxymethyl]-5-(2,4-diketo-5-methyl-pyrimidin-1-yl)tetrahydrofuran-3-yl] ester;[(2R,3S,5R)-2-[(tert-butyl-dimethyl-silyl)oxymethyl]-5-(5-methyl-2,4-dioxo-pyrimidin-1-yl)oxolan-3-yl] ethanoate
[(2R,3S,5R)-2-[(tert-butyl-dimethylsilyl)oxymethyl]-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-3-yl] acetate