Novel amphoteric tricyclic compound represented by the following formula: ##STR1## wherein R.sup.1 represents a hydrogen atom or a halogen atom; X represents --O--, --CH.sub.2 O--, or --OCH.sub.2 --; and Y represents a C.sub.2 -C.sub.5 alkylene group which may optionally be substituted with a lower alkyl group, and a pharmacologically acceptable salt thereof are disclosed. Also disclosed are a pharmaceutical composition comprising the same and a method for treatment of an allergic disease or bronchial asthma.
本发明涉及一种新型的两性
三环化合物,其
化学式如下:##STR1##其中,R1表示氢原子或卤素原子;X表示—O—,—
CH2O—或—OCH2—;Y表示C2-C5烷基,该烷基可以选择性地被低烷基取代,以及该化合物的药学上可接受的盐。本发明还涉及包含该化合物的制药组合物以及治疗过敏性疾病或支气管哮喘的方法。