The invention provides a pyrazolopyrimidine derivative of formula (I), wherein, for example, R1 represents —NR1aR1b (wherein R1a and R1b are the same or different and each is a hydrogen atom or aralkyl), R2 represents 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, R5 represents halogen, R6 represents aryl, X represents —CR8 (wherein R8 represents a hydrogen atom), and R7 represents a hydrogen], R3 represents —SO2R13a [wherein R13a represents lower alkoxy, —NR13dC(═O)R13e (wherein R13d represents a hydrogen atom, and R13e represents lower alkyl)], and R4 represents a hydrogen atom, or a pharmaceutically acceptable salt thereof. The invention also provides a medicament containing the pyrazolopyrimidine derivative, as well as a method of using the pyrazolopyrimidine derivative to prevent and/or treat skin diseases.
本发明提供一种式(I)的
吡唑嘧啶衍
生物,其中,例如,R1代表—NR1aR1b(其中R1a和R1b相同或不同,且每个都是
氢原子或芳基烷基),R2代表式(Ya)[其中k和m分别表示0-2的整数,n表示0-4的整数,L表示单键,R5表示卤素,R6表示芳基,X表示—CR8(其中R8表示
氢原子),R7表示
氢],R3表示—SO2R13a [其中R13a表示低
碳酰
氧基,—NR13dC(═O)R13e(其中R13d表示
氢原子,R13e表示低烷基)],R4表示
氢原子,或其药学上可接受的盐。本发明还提供一种含有该
吡唑嘧啶衍
生物的药物,以及使用该
吡唑嘧啶衍
生物预防和/或治疗皮肤疾病的方法。