The invention relates to new compounds, of antiallergic activity, of the formula: ##STR1## wherein R.sup.1 is aryl substituted with substituent(s) selected from the group consisting of hydroxy, protected hydroxy, halogen and lower alkoxy, A is lower alkylene, and B is lower alkenylene, or a pharmaceutically acceptable salt thereof.
本发明涉及新的抗过敏活性化合物,其
化学式为:##STR1## 其中,R.sup.1是芳基,其上带有羟基、保护羟基、卤素和较低的烷氧基等取代基;A是较低的烷基,B是较低的烯基,或其药学上可接受的盐。