Methods of treating pneumocystis carinii pneumonia

A method of treating Pneumocystis carinii pneumonia in a subject in need of such treatment, comprising administering to said subject a compound of Formula I:

• ##STR6## wherein:
• X and Y are located in the para or meta positions and are each ##STR7## 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 with --NCN-- to which they are attached form an imidazolinyl ring or tetrahydropyrimidinyl ring or two R.sub.1 groups together represent ##STR8## wherein m is from 1-3 and R.sub.7 is H or --CONHR.sub.8 NR.sub.9 R.sub.10, wherein R.sub.8 is loweralkyl, and R.sub.9 and R.sub.10 are each independently selected from the group consisting of H and lower alkyl;
• R.sub.2 is H, hydroxy, loweralkyl, alkoxyalkyl, hydroxyalkyl, aminoalkyl, alkylaminoalkyl, cycloalkyl, aryl, or alkylaryl;
• n is a number from 0 to 2;
• R.sub.3 and R.sub.4 are each independently selected from the group consisting of H, loweralkyl, loweralkoxy, alkylaryl, aryl, oxyaryl, aminoalkyl, aminoaryl, or halogen;
• and
• R.sub.5 and R.sub.6 are each independently selected from the group consisting of H, loweralkyl, aryl, alkylaryl, aminoalkyl, aminoaryl, halogen, oxyalkyl, oxyaryl, or oxyarylalkyl;
• or a pharmaceutically acceptable salt thereof, in an amount effective to treat Pneumocystis carinii pneumonia.