The compound 3,3,3-trifluoro-N-((l,4-trans)-4-((3-((S)-2-methylmorpholino)-lH- pyrazolo[3,4-d]pyrimidin-6- yl)amino)cyclohexyl)propane-l-sulfonamidehaving the Formula (I) or a salt thereof, its opposite enantiomer, compositions compris ing the compound and its use in the treatment or prevention of leishmaniasis, particularly visceral leishmaniasis.