| abstract |
The present invention is composed of a nucleoside derivative of the following general formula I!: ##STR1## (wherein B represents adenin-9-ylmethyl, guanin-9-ylmethyl, hypoxanthin-9-ylmethyl, thymin-1-ylmethyl, uracil-1-ylmethyl, or cytosin-1-ylmethyl; X and Y may be the same or different and each represents hydrogen or hydroxy, exclusive of the case in which X is hydrogen and Y is hydroxy). n The compound of the present invention is useful as an antiviral agent or an antimalignant-tumoral agent. |