The invention relates to compounds of the formula and to pharmaceutically acceptable salts, prodrugs and solvates thereof, wherein R1, R2, R3, R4, R5, R17, Rf, A, X, and Y are as defined herein. The invention also relates to pharmaceutical compositions containing the compounds of formulas 1, methods of using the compounds of formula 1 in the treatment of infections and methods of preparing the compounds of formula 1.