| abstract |
The present invention relates to a novel pyrimidine acyclonucleoside derivative represented by the following structural formula (I) and an antiviral agent comprising the same as an active ingredient.n n n n n n n n In the above formula, R 1 is an ethyl group or isopropyl group, R 2 is a substituted or unsubstituted phenyl selenenyl group, the substituent is one or more selected from alkyl groups and halogen atoms of C 1 ~ C 2 , R 3 is hydrogen An atom, a C 1 to C 3 alkyl group, a C 1 to C 3 hydroxyalkyl group, an acyloxyalkyl group or a substituted or unsubstituted phenyl group may be selected from the group consisting of C 1 to C 3 alkyl group and C 1 to C 3 alkoxy group Or a halogen atom, X is an oxygen atom or a sulfur atom. |