AROMATIC FUSED HETEROCYCLIC DERIVATIVE AND PHARMACEUTICAL COMPOSITION CONTAINING SAME

摘要

Disclosed is a compound having an activity of modulating a histamine-H4 receptor. Specifically disclosed is a compound represented by formula (I) [wherein Ra and Rb independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, or the like; X represents -O- or -S(O)p-; p represents an integer of 0 to 2; Y represents =O or =S; R1 represents a halogen atom, a substituted or unsubstituted alkyl group, or the like; n represents an integer of 0 to 4; and R2 represents a hydrogen atom, a substituted or unsubstituted alkyl group, or the like], a pharmaceutically acceptable salt of the compound, or a solvate of the compound or the pharmaceutically acceptable salt.