The present invention provides methods for treating Pneumocystis carinii pneumonia and Giardia lamblia in a subject in need of such treatment. The methods comprises administering to the subject a compound of Formula I: ##STR1## wherein: X and Y are located in the para or meta positions and are selected from the group consisting of H, loweralkyl, loweralkoxy, and ##STR2## wherein: each R.sub.1 is independently selected from the group consisting of H, loweralkyl, alkoxyalkyl, hydroxyalkyl, aminoalkyl, alkylaminoalkyl, cycloalkyl, aryl, or alkylaryl or two R.sub.1 groups together represent C.sub.2 -C.sub.10 alkyl, hydroxyalkyl, or alkylene, or two R.sub.1 groups together represent ##STR3## wherein m is from 1-3 and R.sub.7 is H or --CONHCR.sub.8 NR.sub.9 R.sub.10.
本发明提供了治疗需要此类治疗的患者的肺孢子虫肺炎和贾第虫病的方法。该方法包括向患者施用化合物I的方法:##STR1##其中:X和Y位于对位或间位,并且选自由H、较低烷基、较低烷氧基和##STR2##其中:每个R.sub.1独立地选自H、较低烷基、烷氧基烷基、羟基烷基、
氨基烷基、烷基
氨基烷基、环烷基、芳基、或烷基芳基,或两个R.sub.1基团一起代表C.sub.2-C.sub.10烷基、羟基烷基或烷基烯,或两个R.sub.1基团一起代表##STR3##其中m为1-3,R.sub.7为H或--CONHCR.sub.8NR.sub.9R.sub.10。