| 摘要 |
The invention is concerned with compounds of formula wherein R1 is lower-alkoxy, R2 is hydroxy or lower-alkoxy, R3 is hydrogen, cyano, alkyl, alkenyl, cycloalkyl, aryl, heterocycyl, aryl-Q-alkyl, or a group of the formula -CR4R4'COR5-, Q is -SO- or -SO2-; R4, R4' are each independently hydrogen, alkyl, aryl or heterocyclyl, R5 is hydrogen, alkyl, alkoxy, hydroxy, aryl or heterocycyl, or R4 and R5 together form -(CH2)n-, and n is a whole number between 2 to 5 inclusive and the enantiomers, epimers, and diastereomers thereof, as well as pharmaceutically acceptable salts thereof. These compounds have valuable antibacterial activity. |
