Pyrimidine derivatives and anti-viral agent containing the same as active ingredient thereof
 The disclosure concerns pyrimidine derivatives represented by the following general formulas [I] and [I'] and having antiviral activity, particularly antiretroviral activity such as anti-HIV activity: ##STR1## and pharmaceutical compositions having antiviral activity and comprising the above-described derivative(s) as an active ingredient. 
Mitsubishi Kasei Corporation
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Masanori Tadashi Erik D. A. Masaru Richard T. Hiromichi
Baba Miyasaka De Clercq Ubasawa Walker Tanaka