PIPERAZINE COMPOUND HAVING A PGDS INHIBITORY EFFECT

摘要

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.