The invention relates to organic compounds which have interesting pharmaceutical properties. In particular,the compounds are useful in the treatment and/or prevention of infections such as those caused byPlasmodium falciparum,Plasmodium vivax,Plasmodium malariae,Plasmodium ovale,Trypanosoma cruziand parasites of theLeishmaniagenus such as, for example,Leishmania donovani.The invention also relates to pharmaceutical compositions containing the compounds, as well as processes for their preparation.本發明係關於具有重要之醫藥特性的有機化合物。詳言之,該等化合物適用於治療及/或預防感染,諸如彼等由惡性瘧原蟲(Plasmodium falciparum)、間日瘧原蟲(Plasmodium vivax)、三日瘧原蟲(Plasmodium malariae)、卵形瘧原蟲(Plasmodium ovale)、克氏錐蟲(Trypanosoma cruzi)及諸如黑熱病利什曼原蟲(Leishmania donovani)之利什曼原蟲(Leishmania)屬之寄生蟲引起的感染。本發明亦係關於含有該等化合物之醫藥組合物,以及其製備方法。