| 摘要 |
<p>The present invention is to provide novel tricyclic compounds having leukotriene antagonistic action and represented by the formula: <CHEM> wherein R<1> represents a halogen atom, etc., R<2> represents a nitro group, etc., A represents a 5-membered or a 6-membered heteroaromatic ring group containing 1 to 3 hetero atoms selected from the group consisting of a nitrogen atom, an oxygen atom and a sulfur atom, etc., B represents a formula: -OCH2-, etc., X represents a sulfur atom, etc., Y represents C1-C10 alkylene group which may have a halogen atom, etc. as a substituent(s), Z represents a carboxyl group whic may be protected, etc., ------ represents a single bond or a double bond, m is an integer of 1 to 4, n is an integer of 1 to 3, or a pharmaceutically acceptable salt thereof.</p> |
