Abstract: The present invention provides a heterocyclic compound represented by the following formula (I) or a pharmaceutically acceptable salt thereof, in which XA, R1, YA, R2, R3A, and R4A are as defined herein. The compound of formula (I) inhibits a C-C chemokine receptor type 10 (CCR10) receptor and is useful as a prophylactic and/or therapeutic agent for skin diseases.

Abstract: The invention provides a pyridone compound represented by the following formula (I) [wherein, R1 represents cycloalkyl optionally having substituent(s) and the like, R2 represents a hydrogen atom and the like, R3 represents hydroxy and the like, and R4A represents the following formula (R4A-1) (wherein, R4 and R5 are the same or different and each represents a hydrogen atom and the like), and the like], or a pharmaceutically acceptable salt thereof, which is useful as a prophylactic and/or therapeutic agent for skin diseases, and the like.

Abstract: The invention provides a pyridone compound represented by the following formula (I) [wherein, R1 represents cycloalkyl optionally having substituent(s) and the like, R2 represents a hydrogen atom and the like, R3 represents hydroxy and the like, and R4A represents the following formula (R4A-1) (wherein, R4 and R5 are the same or different and each represents a hydrogen atom and the like), and the like], or a pharmaceutically acceptable salt thereof, which is useful as a prophylactic and/or therapeutic agent for skin diseases, and the like.

Abstract: The present invention provides a heterocyclic compound represented by the following formula (I), wherein XA represents CH and the like, R1 represents cycloalkyl optionally having substituent(s) and the like, L represents a bond and the like, YA represents —NH— and the like, R2 represents a hydrogen atom and the like, R3A represents the following formula (R3A-1) (wherein, R3 represents hydroxy and the like) and the like, and R4A represents the following formula (R4A-1) (wherein, R4 and R5 are the same or different and each represents a hydrogen atom and the like) and the like, or a pharmaceutically acceptable salt thereof, which is useful as a prophylactic and/or therapeutic agent for skin diseases and the like, and the like.

Abstract: 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.

Abstract: The invention provides a chemokine receptor activity modulator containing a pyrazolopyrimidine derivative represented by the formula (I) wherein R1, R2, R3, and R4 are as described herein.

Abstract: Provided is an agent for the prevention and/or treatment of a skin disease containing, as an active ingredient, a pyrazolopyrimidine derivative represented by the formula (I) (wherein each symbol is as defined in the specification), or a pharmacologically acceptable salt thereof, and the like.

Abstract: 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.

Abstract: The present invention provides a PPAR ? agonist comprising, as an active ingredient, a tricyclic compound represented by the formula (I) (wherein R1 represents lower alkyl optionally having substituent(s) or the like, R2 and R3 are the same or different and each represents lower alkyl optionally having substituent(s) or the like, R4 and R5 are the same or different and each represents a hydrogen atom or the like, Q1-Q2-Q3 represents CH?CH—CH?CH or the like, Y represents a single bond or the like, Z1-Z2 represents C?CR13 (wherein R13 represents a hydrogen atom or the like), or the like, and A represents —COOH or the like), or a pharmaceutically acceptable salt thereof and the like.

Abstract: Provided is an agent for the prevention and/or treatment of a skin disease containing, as an active ingredient, a pyrazolopyrimidine derivative represented by the formula (I) (wherein each symbol is as defined in the specification), or a pharmacologically acceptable salt thereof, and the like.

Abstract: The present invention provides a PPAR ? agonist comprising, as an active ingredient, a tricyclic compound represented by the formula (I) (wherein R1 represents lower alkyl optionally having substituent(s) or the like, R2 and R3 are the same or different and each represents lower alkyl optionally having substituent(s) or the like, R4 and R5 are the same or different and each represents a hydrogen atom or the like, Q1-Q2-Q3 represents CH?CH—CH?CH or the like, Y represents a single bond or the like, Z1-Z2 represents C?CR13 (wherein R13 represents a hydrogen atom or the like), or the like, and A represents —COOH or the like), or a pharmaceutically acceptable salt thereof and the like.

Abstract: [wherein m and n may be the same or different and each represents an integer of 1 to 3 wherein m+n is 4 or less; R1 represents —NR4R5 (wherein R4 and R5 may be the same or different and each represents a hydrogen atom, substituted or unsubstituted lower alkyl, substituted or unsubstituted aralkyl or the like); R2 represents the above Formula (II), Formula (IV) or the like; A represents a single bond, —C(?O)—, —SO2—, —OC(?O)— or the like; and R3 represents substituted or unsubstituted lower alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aralkyl or the like] Bicyclic pyrimidine derivatives represented by the above Formula (I), or quaternary ammonium salts thereof, or pharmaceutically acceptable salts thereof, or the like, are provided.

Abstract: [wherein m and n may be the same or different and each represents an integer of 1 to 3 wherein m+n is 4 or less; R1 represents —NR4R5 (wherein R4 and R5 may be the same or different and each represents a hydrogen atom, substituted or unsubstituted lower alkyl, substituted or unsubstituted aralkyl or the like); R2 represents the above Formula (II), Formula (IV) or the like; A represents a single bond, —C(?O)—, —SO2—, —OC(?O)— or the like; and R3 represents substituted or unsubstituted lower alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aralkyl or the like] Bicyclic pyrimidine derivatives represented by the above Formula (I), or quaternary ammonium salts thereof, or pharmaceutically acceptable salts thereof, or the like, are provided.

Abstract: A pyrimidine derivative represented by Formula (I) wherein Ar represents substituted or unsubstituted aryl, R1 represents —NR2R3 and wherein R2 represents a hydrogen atom or substituted or unsubstituted lower alkyl and R3 represents substituted or unsubstituted lower alkyl, substituted or unsubstituted aralkyl, A represents a single bond, Formula (III) wherein m1 is 0 to 2, n1 is 0 to 4, a1 is from 0 to a substitutable number, R5 represents substituted or unsubstituted lower alkyl, and each R5 may be the same or different when a1 is 2 or more), and Q represents —NR6R7 (wherein R6 and R7 may be the same or different and each represents a hydrogen atom, a substituted or unsubstituted heteroalicyclic group, a substituted or unsubstituted heteroalicyclic group, substituted or unsubstituted piperidin-4-ylamino, or quaternary ammonium salts thereof, or pharmaceutically acceptable salts thereof.