uridylyl-(3'->5')-guanosine

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

uridine 3'-(2,2,2-trichloroethyl) phosphate

uridine 3'-(2-ethoxyethyl) phosphate