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.
This disclosure describes a compound of Formula 1 ##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.