| abstract |
Disclosed is a pyrazolopyrimidine derivative represented by formula (I), a pharmaceutically acceptable salt thereof or the like, which is useful as a prophylactic and/or therapeutic agent for skin diseases. (In the formula, R represents -NRR (wherein R and R may be the same or different and each represents a hydrogen atom, an aralkyl group or the like) or the like; R represents a group represented by formula (Ya) (wherein k and m each represents an integer of 0-2; n represents an integer of 0-4; L represents a single bond or the like; R represents a halogen or the like; R represents an aryl or the like; X represents CR (wherein R represents a hydrogen atom or the like) or the like; and R represents a hydrogen atom or the like) or the like; R represents -SOR (wherein R represents a lower alkoxy, -NRC(=O)R (wherein R represents a hydrogen atom or the like, and R represents a lower alkyl or the like) or the like) or the like; and R represents a hydrogen atom or the like.) |