| 摘要 |
<p>Compounds, and procedure for their preparation, of general formula wherein: R represents hydrogen, a pharmaceutically acceptable cation, or an alkyl group of 1 to 5 carbon atoms; X represents nitrogen or the group R2?; and R1 and R2, subject to certain restrictions, represent hydrogen, alkyl radicals of 1 to 5 carbon atoms; aralkyl, phenyl, thienyl or pyridyl group optionally substituted by halogen, alkyl or alkoxy radicals of up to 4 carbon atoms, or cycloalkyl radicals of 5 to 7 carbon atoms, and pharmaceutically acceptable salts thereof. These compounds have been found to stimulate the immune system, and are thus of use in treating a number of situations, typical of which is a virus infection.</p> |
