| 摘要 |
The invention relates to compounds of the formula 1 and to pharmaceutically acceptable salts, solvates and prodrugs thereof, wherein R, R1, R2, R3, R4, R5, R6 and R7 are as defined herein. The invention also relates to pharmaceutical compositions containing the compounds of formula 1, methods of treating infections by administering the compounds of formula 1, and methods of preparing the compounds of formula 1.
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