Novel bridged compounds of formula (I) are disclosed herein, along with their pharmaceutically acceptable salts and hydrates. Also disclosed are compositions comprising such compounds, methods of preparing such compounds and methods of using such compounds as antibacterial agents. The disclosed compounds, their pharmaceutically acceptable salts, hydrates and prodrugs, as well as compositions comprising such compounds, salts, hydrates and prodrugs, are useful for treating bacterial infections and associated diseases and conditions.