| 摘要 |
<p>Tricyclic compounds of formula (I) < IMG > (I) wherein: Z represents an oxygen atom or a methylene group, X1 represents a hydrogen atom or a halogen atom, R1 represents a cyclic amino group which may contain additional hetero atom(s) of N,S and O and may be substituted with one or more substituents selected from the group consisiting of hydroxyl, amino, alklyl, mono- or di-alkylamino, hydroxyalkyl and aminoalkyl, and physiologically acceptable salts thereof, having antibacterial activity.</p> |
