A compound represented by Formula (1) can be used as a prolonged ectoparasite-controlling agent for an animal. A preparation for systemic application for use in prolonged control of an ectoparasite in an animal include the compound. A method for prolonged control of an ectoparasite on an animal includes systemically applying the compound. The compound may be used for preparing a medicament for prolonged control of an ectoparasite on an animal. A horticultural or agricultural insecticide containing the compound, and a method of protecting a crop from a harmful organism is also provided.由化學式（1）表示的化合物可用作動物用持久性體外寄生蟲控制劑。用於動物體外寄生蟲的持久性控制之全身性施用的製劑包含該化合物。持久性控制動物體外寄生蟲的方法包含全身性地施用該化合物。該化合物可用於製備持久性控制動物體外寄生蟲的藥劑。亦提供含有該化合物的園藝或農業殺蟲劑、及相對於有害生物體保護作物的方法。
