| 摘要 |
<p>The present invention relates to the use as antivirals of compounds of formula (I), wherein B is a purinic or pyrimidinic heterocycle; X is oxygen or sulphur; R1 is a hydroxyl group or a hydrogen atom; R2 is a linear, branched or cyclic, alkyl group of up to twenty carbon atoms; R3 is as specified for R2 above or a hydrogen atom, a cation or a polyhydroxy group.</p> |
