| 摘要 |
<p>Novel compound represented by the formula: <CHEM> wherein X stands for a methine group (i.e. the group -CH=) or a nitrogen atom; R<1> stands for a hydrogen atom, an optionally substituted lower alkyl group or a halogen atom; R<2> and R<3> respectively stand for a hydrogen atom or an optionally substituted lower alkyl group, or, taken together, may form a 5- to 7-membered ring combined with the adjacent -C=C-; R<4> and R<5> respectively stands for a hydrogen atom or an optionally substituted lower alkyl group or, taken together, form a 3- to 7-membered homo- or hetero-cyclic ring combined with the adjacent carbon atom; A stands for an optionally substituted amino group; m and n denote 1 to 4, respectively, or salts thereof which has an antiallergic, antiinflammatory and anti-PAF activity and is useful as an antiasthmatic agent.</p> |
