| 摘要 |
Compounds of the formula <CHEM> wherein R<1> is OH, NH2; R<2> is a heteroaromatic or aromatic substituent as defined in claim 1; R<3> is H, OH, F, OCH3; R<4> is H, F, OH or an ether or ester residue thereof, OCH3, CN, C IDENTICAL CH, N3; R<5> is OH or an ether or ester residue thereof including mono-, di- and triphosphate esters; <CHEM> wherein n is O or 1 and M is hydrogen or a pharmaceutically acceptable counterion such as sodium, potassium, ammonium or alkylammonium; and pharmaceutically acceptable salts thereof; and pharmaceutical compositions comprising said compounds can be used for therapeutic and/or prophylactic treatment of virus infections such as AIDS. Compounds of the formula <CHEM> wherein R<1> and R<2> are as defined above, are new precursor compounds.
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