Abstract: Fused heterocyclic compounds useful for prevention, treatment or improvement of diseases against which activation of the thrombopoietin receptor is effective are provided. A compound represented by the formula (I) (wherein R1 is an aryl group fused to a saturated ring or the like, A, B, L1, R2, L2, L3, Y, L4, R3 and X are defined in the description), a tautomer, prodrug or a pharmaceutically acceptable salt of the compound or a solvate thereof.

Abstract: An expansion agent for hematopoietic stem cells and/or hematopoietic progenitor cells useful for improvement in the efficiency of gene transfer into hematopoietic stem cells for gene therapy useful for treatment of various disorders is provided. An expansion agent for hematopoietic stem cells and/or hematopoietic progenitor cells containing a compound represented by the formula (I) (wherein X, Y, Z, Ar1, R1, R2, R3, R4, R5, R6 and R7 are as defined in the description), a tautomer, prodrug or pharmaceutically acceptable salt of the compound or a solvate thereof, which can expand hematopoietic stem cells and/or hematopoietic progenitor cells.

Abstract: The present invention provides compounds useful for prevention, treatment or alleviation of diseases against which activation of the thrombopoietin receptor is effective. A compound represented by the formula (1): wherein A, B, R1, L1, R2, L2, L3, Y, L4, R3 and X are the same as defined in the description, a tautomer, prodrug or pharmaceutically acceptable salt of the compound or a solvate thereof.

Abstract: Compounds effective for preventing, treatment or improving diseases against which activation of the thrombopoietin receptor is effective are provided. A compound represented by the formula (I) (wherein R1, R2, R3, L1, L2, L3, X and Y are defined in the description), a tautomer, prodrug or pharmaceutically acceptable salt of the compound or a solvate thereof.

Abstract: A compound represented by the formula (I) (wherein R1, R2, R3 and R4 are as defined in the description), a tautomer, prodrug or pharmaceutically acceptable salt of the compound or a solvate thereof.

Abstract: A compound represented by the formula (I) (wherein R1, R2, R3 and R4 are as defined in the description), a tautomer, prodrug or pharmaceutically acceptable salt of the compound or a solvate thereof.

Abstract: A compound represented by the formula (1): wherein A is a nitrogen atom or CR4, B is an oxygen atom, a sulfur atom or NR9 (provided that when A is a nitrogen atom, B is not NH), R1 is a C2-14 aryl group, L1 is a bond, CR10R11, an oxygen atom, a sulfur atom or NR12, X is OR13, SR13 or NR14NR15, R2 is a hydrogen atom, a formyl group, a C1-10 alkyl group or the like, L2 is a bond or the like, L3 is a bond, CR17R18, an oxygen atom, a sulfur atom or NR19, L4 is a bond, CR20R21, an oxygen atom, a sulfur atom or NR22, Y is an oxygen atom, a sulfur atom or NR23, and R3 is a C2-14 aryl group, a tautomer, prodrug or pharmaceutically acceptable salt of the compound or a solvate thereof.

Abstract: An expansion agent for hematopoietic stem cells and/or hematopoietic progenitor cells useful for improvement in the efficiency of gene transfer into hematopoietic stem cells for gene therapy useful for treatment of various hematopoietic disorders is provided. A method for expanding hematopoietic stem cells and/or hematopoietic progenitor cells, which comprises culturing hematopoietic stem cells and/or hematopoietic progenitor cells ex vivo in the presence of a compound represented by the formula (I) (wherein X, Y, X, Ar1, R1, R2, R3, R4, R5, R6 and R7 are defined in the description), a tautomer or pharmaceutically acceptable salt of the compound or a solvate thereof.

Abstract: A compound represented by the formula (1): wherein A is a nitrogen atom or CR4, B is an oxygen atom, a sulfur atom or NR9 (provided that when A is a nitrogen atom, B is not NH), R1 is a C2-14 aryl group, L1 is a bond, CR10R11, an oxygen atom, a sulfur atom or NR12, X is OR13, SR13 or NR14NR15, R2 is a hydrogen atom, a formyl group, a C1-10 alkyl group or the like, L2 is a bond or the like, L3 is a bond, CR17R18, an oxygen atom, a sulfur atom or NR19, L4 is a bond, CR20R21, an oxygen atom, a sulfur atom or NR22, Y is an oxygen atom, a sulfur atom or NR23, and R3 is a C2-14 aryl group, a tautomer, prodrug or is pharmaceutically acceptable salt of the compound or a solvate thereof.

Abstract: Compounds effective for preventing, treatment or improving diseases against which activation of the thrombopoietin receptor is effective are provided. A compound represented by the formula (I) (wherein R1, R2, R3, L1, L2, L3, X and Y are defined in the description), a tautomer, prodrug or pharmaceutically acceptable salt of the compound or a solvate thereof.

Abstract: The present invention provides compounds useful for prevention, treatment or alleviation of diseases against which activation of the thrombopoietin receptor is effective. A compound represented by the formula (1): wherein A, B, R1, L1, R2, L2, L3, Y, L4, R3 and X are the same as defined in the description, a tautomer, prodrug or pharmaceutically acceptable salt of the compound or a solvate thereof.

Abstract: A compound represented by the formula (I) (wherein R1, R2, R3 and R4 are as defined in the description), a tautomer, prodrug or pharmaceutically acceptable salt of the compound or a solvate thereof.

Abstract: A compound represented by the formula (1): wherein A is a nitrogen atom or CR4, B is an oxygen atom, a sulfur atom or NR9 (provided that when A is a nitrogen atom, B is not NH), R1 is a C2-14 aryl group, L1 is a bond, CR10R11, an oxygen atom, a sulfur atom or NR12, X is OR13 SR13 or NR14NR15, R2 is a hydrogen atom, a formyl group, a C1-10 alkyl group or the like, L2 is a bond or the like, L3 is a bond, CR17R18, an oxygen atom, a sulfur atom or NR19, L4 is a bond, CR20R21, an oxygen atom, a sulfur atom or NR22, Y is an oxygen atom, a sulfur atom or NR23, and R3 is a C2-14 aryl group, a tautomer, prodrug or pharmaceutically acceptable salt of the compound or a solvate thereof.

Abstract: A compound represented by the formula (1): wherein A is a nitrogen atom or CR4, B is an oxygen atom, a sulfur atom or NR9 (provided that when A is a nitrogen atom, B is not NH), R1 is a C2-14 aryl group, L1 is a bond, CR10R11, an oxygen atom, a sulfur atom or NR12, X is OR13, SR13 or NR14NR15, R2 is a hydrogen atom, a formyl group, a C1-10 alkyl group or the like, L2 is a bond or the like, L3 is a bond, CR17R18, an oxygen atom, a sulfur atom or NR19, L4 is a bond, CR20R21, an oxygen atom, a sulfur atom or NR22, Y is an oxygen atom, a sulfur atom or NR23, and R3 is a C2-14 aryl group, a tautomer, prodrug or is pharmaceutically acceptable salt of the compound or a solvate thereof.

Abstract: A compound represented by the formula (1): wherein A is a nitrogen atom or CR4, B is an oxygen atom, a sulfur atom or NR9 (provided that when A is a nitrogen atom, B is not NH), R1 is a C2-14 aryl group, L1 is a bond, CR10R11, an oxygen atom, a sulfur atom or NR12, X is OR13 SR13 or NR14NR15, R2 is a hydrogen atom, a formyl group, a C1-10 alkyl group or the like, L2 is a bond or the like, L3 is a bond, CR17R18, an oxygen atom, a sulfur atom or NR19, L4 is a bond, CR20R21, an oxygen atom, a sulfur atom or NR22, Y is an oxygen atom, a sulfur atom or NR23, and R3 is a C2-14 aryl group, a tautomer, prodrug or pharmaceutically acceptable salt of the compound or a solvate thereof.