Abstract: A compound represented by the general formula (V) wherein all the symbols are as defined in the specification, has an improved balance of the agonist activity against the S1P5 receptor relative to the S1P1 receptor, and can thus serve as a therapeutic agent for S1P5-mediated diseases such as schizophrenia and Binswanger's disease and other neurodegenerative diseases.

Abstract: A compound represented by the general formula (V) wherein all the symbols are as defined in the specification, has an improved balance of the agonist activity against the S1P5 receptor relative to the S1P1 receptor, and can thus serve as a therapeutic agent for S1P5-mediated diseases such as schizophrenia and Binswanger's disease and other neurodegenerative diseases.

Abstract: A compound represented by the general formula (V) wherein all the symbols are as defined in the specification, has an improved balance of the agonist activity against the S1P5 receptor relative to the S1P1 receptor, and can thus serve as a therapeutic agent for S1P5-mediated diseases such as schizophrenia and Binswanger's disease and other neurodegenerative diseases.

Abstract: A compound represented by the general formula (V) wherein all the symbols are as defined in the specification, has an improved balance of the agonist activity against the S1P5 receptor relative to the S1P1 receptor, and can thus serve as a therapeutic agent for S1P5-mediated diseases such as schizophrenia and Binswanger's disease and other neurodegenerative diseases.

Abstract: A compound represented by the general formula (V) wherein all the symbols are as defined in the specification, has an improved balance of the agonist activity against the S1P5 receptor relative to the S1P1 receptor, and can thus serve as a therapeutic agent for S1P5-mediated diseases such as schizophrenia and Binswanger's disease and other neurodegenerative diseases.

Abstract: A compound represented by the following formula (1) is provided: wherein X represents a sulfur atom or —CH?CH—; A1 to A4 each independently represent a carbon atom or a nitrogen atom, and at least one of A1 to A4 is a nitrogen atom; R1 represents any one of a 1,2,3,4-tetrahydroquinolyl group (or a 3,4-dihydro-1(2H)-quinolyl group), a 3,4-dihydro-4,4-dimethyl-1(2H)-quinolyl group, a 2,3,4,5-tetrahydro-1H-1-benzazepinyl group, or a substituent represented by the following formula (2): wherein R4 represents a 2,3,4-trifluorophenyl group, a 4-iodophenyl group, a 2,3-difluorophenyl group, a 3,5-difluorophenyl group, a 5-fluoro-2-methylphenyl group, a 3-pentafluorosulfanylphenyl group, a 2,6-dimethylphenyl group, a 4-benzyloxyphenyl group, a 3,5-bis(trifluoromethyl)biphenyl group, a 4-tert-butylphenyl group, a 3-methoxyphenyl group, an unsubstituted or substituted pyridyl group, or an unsubstituted or substituted naphthyl group; R5 represents a hydrogen atom, a lower alkyl group, a lower alkenyl group, a l

Abstract: It is an object of the present invention to provide a compound inhibiting the binding between ALS-related mutant SOD1 and Derlin-1, a medicament comprising the compound, and a method for treating ALS by administering the medicament to a patient.