This disclosure describes a compound of Formula I ##STR1## (including its pharmaceutically acceptable salts and esters) which has potent antihistamine activity which is substantially free from sedative effects and which has little or no anticholinergic effects.
这份披露描述了I式化合物 ##STR1##(包括其药学上可接受的盐和酯),该化合物具有强效的抗
组胺活性,而且几乎没有抗
胆碱作用和镇静剂作用。