Tricyclic compounds represented by general formula (I), pharmacologically acceptable salts thereof, and a process for producing the same. In formula (I) X represents -CH = CH-, -CH20- or -O-; R1 represents lower alkyl; R2 represents hydrogen or lower alkyl; and n represents an integer of 1 to 5. They have antiallergic and antihistaminic activities with alleviated side effects and hence are useful as an antiallergic and antihistaminic.
由通式(I)代表的
三环化合物、其药理学上可接受的盐及其生产工艺。在式(I)中,X 代表-CH = CH-、-CH20-或-O-;R1 代表低级烷基;R2 代表氢或低级烷基;n 代表 1 至 5 的整数。它们具有抗过敏和抗
组胺活性,副作用小,因此可用作抗过敏和
抗组胺药。