| abstract |
The present invention provides a tricyclic compound represented by the formula (I), a pharmaceutical salt thereof or a stereoisomer thereof, which exhibits an excellent antibacterial activity against a Gram-negative bacteria-resistant bacterium, and is also considered from the viewpoint of safety. Excellent. Further, the present invention provides a production method; a pharmaceutical composition comprising a tricyclic compound, a pharmaceutically acceptable salt thereof, or a stereoisomer thereof as an active ingredient; and use thereof as a pharmaceutical preparation. The compounds of the present invention are useful in the treatment and/or prevention of diseases such as complicated urinary tract infections (cUTIs), nosocomial pneumonia, intra-abdominal infections (IAIs) or bacteria. Blood. |