Several bicyclic amides and esters of dialkylamino acids were prepared. Their activities against a multiresistant strain of Plasmodium falciparum and against Trypanosoma brucei rhodesiense (STIB 900) were examined. Structure-activity relationships were discussed. Particularly the ester compounds showed good antiplasmodial and antitrypanosomal activity and a single compound was tested in vivo against Plasmodium berghei.
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