The present invention provides a novel compound having a control efficacy on harmful arthropods. A compound represented by Formula (I): wherein Y represents a 3-7-membered saturated heterocyclic group containing one or more atoms or groups selected from the group consisting of oxygen atom and -S(O)t- as the heterocycle-constituting element, wherein the saturated heterocyclic group may optionally be substituted with the same or different 1 to 3 atoms or groups selected from Group D t represents 0 etc. X represents a phenyl group etc. W represents an oxygen atom etc. r represents 0 etc. R1, R2, R3, R4, R5, R6, R7 and R8 are the same or different to each other and each independently represent hydrogen atom etc. and n represents 1 etc. shows an excellent controlling efficacy on harmful arthropods.本發明提供對有害節肢動物具有防治功效之新穎化合物。以式(I)表示之化合物:其中Y代表含有一或多個選自氧原子及-S(O)t-之原子或基團作為雜環構成要素的3-7員飽和雜環基,其中該飽和雜環基可隨意地經相同或不同之1至3個選自D群的原子或基團取代;t代表0等等;X代表苯基等等;W代表氧原子等等;r代表0等等;R1、R2、R3、R4、R5、R6、R7及R8彼此為相同或不同且各自獨立地代表氫原子等等;且n代表1等等;顯示對有害節肢動物具有優良之防治功效。
