| 摘要 |
<p>Compounds of the formula <CHEM> are disclosed, wherein: Y is an alkylene bridge of 3-9 carbon atoms; Z is N or HC; R is hydrogen or loweralkyl of 1-3 carbon atoms, with the proviso that when Z is N, R is lower-alkyl; R1 and R2 are each hydrogen, halogen, methyl, nitro, loweralkoxycarbonyl or trifluoromethyl; and Het is a heterocyclic group, and pharmaceutically acceptable acid addition salts thereof, as well as methods for preparation and use thereof. The compounds exhibit valuable antiviral properties.</p> |
