Patent ID: 7795285

Claim:
A method of treating trypanosomiasis comprising administering an effective amount of an anti-trypanosomiasis agent comprising a compound of the following formula (1) as an active ingredient wherein R 1 and R 2 each independently represents a hydrogen atom, halogen atom, hydroxyl group, oxygen atom, C 1-5 alkyl group, C 1-5 alkoxy group, C 5-8 aryl group, C 5-8 aryloxy group, C 2-6 alkoxycarbonyl group or C 2-6 alkylaminocarbonyl group, and may be bound to each other; R 3 , R 4 , and R 5 each independently represents a C 1-5 alkyl group or C 5-8 aryl group; R 6 and R 7 each independently represents a hydrogen atom, halogen atom, hydroxyl group, oxygen atom, C 1-8 alkyl group, C 1-5 alkoxy group, C 5-8 aryl group, C 5-8 aryloxy group, or C 2-6 alkoxycarbonyl group, and may be bound to each other; Y and Z each independently represents a 5- or 6-membered heterocycle together with the nitrogen atom, in which hetero atoms included in the heterocyle include a nitrogen atom, oxygen atom, sulfur atom, selenium atom, tellurium atom, silicon atom, and phosphorus atom; m and n each represents 0 or 1; Q represents a physiologically acceptable anion; k represents an integer of 0 to 2, necessary to make the electric charge of the whole molecule 0.