Trypanosomes inhibitors

A compound of formula (I)

• wherein
• A is —C(O)— or —CHCF3—;
• R1 is propyl, pyridinyl or R3;
• R2 is (A), (B), (C), (D), (E), (F) or (G);
• R3 is (H);
• R4 is hydrogen, alkyl or haloalkyl;
• R5 is alkyl, haloalkyl, cycloalkyl, phenyl, halophenyl or alkoxyphenyl;
• R6 is halophenyl;
• R7 is halophenyl;
• R8 is alkyl;
• R9 is alkyl, cycloalkyl, halocycloalkyl, phenyl, halophenyl, alkylsulphanylphenyl, pyridinyl, halopyridinyl, oxanyl, azaspiro[3.3]heptyl, alkoxycarbonylazaspiro[3.3]heptyl, oxetanyl, pyrrolidinyl, alkoxycarbonylpyrrolidinyl, azetidinyl or alkylcarbonylazetidinyl;
• R10 is phenyl;
• R11 is halophenyl;
• R12 is phenyl or halophenyl;
• R13 is hydrogen, halogen, haloalkyl, haloalkoxy, cycloalkylalkoxy, phenylalkoxy, alkoxyalkoxy or cyano;
• R14 is hydrogen, halogen or haloalkyl;
• and
• R15 is hydrogen, halogen, cyano or haloalkyl;
• or a pharmaceutically acceptable salt or ester thereof;
• provided that N-[(1S)-1-[(3-chlorophenyl)methyl]-2-[(1-cyanocyclopropyl)amino]-2-oxoethyl]-3-(1,1-dimethylethyl)-1-methyl-1H-pyrazole-5-carboxamide is excluded.