1-[(2R,5S)-5-(hydroxymethyl)-2,5-dihydrofuran-2-yl]-5-iodopyrimidine-2,4-dione

S-[3-[1-[(2R,4S,5R)-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-2,4-dioxopyrimidin-5-yl]prop-2-ynyl] ethanethioate

S-[4-[1-[(2R,4S,5R)-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-2,4-dioxopyrimidin-5-yl]but-3-ynyl] benzenecarbothioate

[(2R,3S,5R)-5-[5-[4-(tert-butyldisulfanyl)but-1-ynyl]-2,4-dioxopyrimidin-1-yl]-2-(hydroxymethyl)oxolan-3-yl] acetate

1-[4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-5-[(E)-2-phenylethenyl]pyrimidine-2,4-dione