The present invention provides a piperazine compound represented by Formula (I) or a salt thereof, wherein X represents CH or an N atom； R 1 represents C 1-6 alkyl； R 2 represents C 1-6 alkyl that may have one or more substituents, C 2-6 alkenyl that may have one or more substituents, -(C=O)-N(R 3 ) (R 4 ), or -(C=O)-OR 5 , R 3 and R 4 are the same or different, and each represents hydrogen or C 1-6 alkyl that may have one or more substituents； or R 3 and R 4 , taken together with a nitrogen atom to which R 3 and R 4 are attached, may form a saturated heterocyclic group； and R 5 represents hydrogen or C 1-6 alkyl that may have one or more substituents or aralkyl.本發明係提供一種哌化合物或其鹽，該哌化合物係由下述通式(I)表示。[化1][式中，X係表示CH、或N原子，R1係表示碳數1～6的烷基，R2係表示亦可具有取代基之碳數1～6的烷基、亦可具有取代基之碳數2～6的烯基、-(C=O)-N(R3)(R4)基或-(C=O)-OR5基之任一者，R3、R4係表示相同或相異且係氫原子、或亦可具有取代基之碳數1～6的烷基，R3及R4係表示亦可以與各自所鍵結的氮原子一起形成飽和雜環基，R5係表示氫原子、或亦可具有取代基之碳數1～6的烷基或芳烷基]。
