Abstract: The present invention provides a compound having a glucosylceramide lowering action (e.g., promoting glucosylceramide metabolism, inhibition of glucosylceramide synthesis, promoting glucosylceramide catabolism, etc.), which is expected to be useful as an agent for the prophylaxis or treatment of lysosome diseases (e.g., Gaucher's disease), neurodegenerative diseases (e.g., Parkinson's disease, Lewy body dementia, multiple-system atrophy) and the like. The present invention relates to a compound represented by the formula (I) wherein each symbol is as described in the specification, or a salt thereof.

Abstract: The present invention provides a heterocyclic compound having an antagonistic action on an NMDA receptor containing the NR2B subunit, and expected to be useful as an agent for the prophylaxis or treatment of major depression, bipolar disorder, migraine, pain, behavioral and psychological symptoms of dementia and the like. The present invention relates to a compound represented by the formula (I): wherein each symbol is as described in the description, or a salt thereof.

Abstract: The present invention aims to provide a heterocyclic compound having an AMPA receptor potentiator effect, which is expected to be useful as an agent for the prophylaxis or treatment of depression, Alzheimer's disease, schizophrenia, attention deficit hyperactivity disorder (ADHD) and the like. The present invention relates to a compound represented by the formula (I): wherein each symbol is as described in the specification, or a salt thereof.

Abstract: Provided is a heterocyclic compound having a superior RBP4-lowering action and useful as a medicament for the prophylaxis or treatment of a disease or symptom mediated by an increase in RBP4 or retinol supplied by RBP4. A compound represented by the formula (I): wherein each symbol is as defined in the Description, or a salt thereof has a superior RBP4-lowering action, and is useful as a medicament for the prophylaxis or treatment of a disease or symptom mediated by an increase in RBP4 or retinol supplied by RBP4.

Abstract: Provided is a novel aromatic ring compound which may have a GPR40 agonist activity and a GLP-1 secretagogue action. A compound represented by the formula (I): wherein each symbol is as described in the DESCRIPTION, or a salt thereof may have a GPR40 agonist activity and a GLP-1 secretagogue action, may be useful for the prophylaxis or treatment of cancer, obesity, diabetes, hypertension, hyperlipidemia, cardiac failure, diabetic complications, metabolic syndrome, sarcopenia and the like, and may afford superior efficacy.

Abstract: Provided is a heterocyclic compound having a superior RBP4-lowering action and useful as a medicament for the prophylaxis or treatment of a disease or symptom mediated by an increase in RBP4 or retinol supplied by RBP4. A compound represented by the formula (I): wherein each symbol is as defined in the Description, or a salt thereof has a superior RBP4-lowering action, and is useful as a medicament for the prophylaxis or treatment of a disease or symptom mediated by an increase in RBP4 or retinol supplied by RBP4.

Abstract: The present invention provides a heterocyclic compound having an antagonistic action on an NMDA receptor containing the NR2B subunit, and expected to be useful as an agent for the prophylaxis or treatment of major depression, bipolar disorder, migraine, pain, behavioral and psychological symptoms of dementia and the like. The present invention relates to a compound represented by the formula (I): wherein each symbol is as described in the description, or a salt thereof.

Abstract: Provided is a heterocyclic compound having a superior RBP4-lowering action and useful as a medicament for the prophylaxis or treatment of a disease or symptom mediated by an increase in RBP4 or retinol supplied by RBP4. A compound represented by the formula (I): wherein each symbol is as defined in the Description, or a salt thereof has a superior RBP4-lowering action, and is useful as a medicament for the prophylaxis or treatment of a disease or symptom mediated by an increase in RBP4 or retinol supplied by RBP4.

Abstract: Provided is a heterocyclic compound having a superior RBP4-lowering action and useful as a medicament for the prophylaxis or treatment of a disease or symptom mediated by an increase in RBP4 or retinol supplied by RBP4. A compound represented by the formula (I): wherein each symbol is as defined in the Description, or a salt thereof has a superior RBP4-lowering action, and is useful as a medicament for the prophylaxis or treatment of a disease or symptom mediated by an increase in RBP4 or retinol supplied by RBP4.

Abstract: Provided is a heterocyclic compound having a superior RBP4-lowering action and useful as a medicament for the prophylaxis or treatment of a disease or symptom mediated by an increase in RBP4 or retinol supplied by RBP4. A compound represented by the formula (I): wherein each symbol is as defined in the Description, or a salt thereof has a superior RBP4-lowering action, and is useful as a medicament for the prophylaxis or treatment of a disease or symptom mediated by an increase in RBP4 or retinol supplied by RBP4.

Abstract: The present invention relates to a condensed heterocyclic compound that has an enteropeptidase inhibitory effect and is useful in the treatment or prevention of obesity, diabetes mellitus, or the like, and a medicament containing the same. Specifically, the present invention relates to a compound represented by the following formula (I) or a salt thereof, and a medicament containing the same [in the formula, each symbol is as defined in the specification].

Abstract: Provided is a heterocyclic compound having a superior RBP4-lowering action and useful as a medicament for the prophylaxis or treatment of a disease or symptom mediated by an increase in RBP4 or retinol supplied by RBP4. A compound represented by the formula (I): wherein each symbol is as defined in the Description, or a salt thereof has a superior RBP4-lowering action, and is useful as a medicament for the prophylaxis or treatment of a disease or symptom mediated by an increase in RBP4 or retinol supplied by RBP4.

Abstract: The present invention provides a heterocyclic compound having an IRAK-4 inhibitory action, which is useful for the prophylaxis or treatment of inflammatory disease, autoimmune disease, osteoarticular degenerative disease, neoplastic disease and the like, and a medicament containing thereof. The present invention relates to a compound represented by the formula (I): wherein each symbol is as defined in the specification, or a salt thereof.

Abstract: The present invention relates to a condensed heterocyclic compound that has an enteropeptidase inhibitory effect and is useful in the treatment or prevention of obesity, diabetes mellitus, or the like, and a medicament containing the same. Specifically, the present invention relates to a compound represented by the following formula (I) or a salt thereof, and a medicament containing the same [in the formula, each symbol is as defined in the specification].

Abstract: Provided is a heterocyclic compound having a superior RBP4-lowering action and useful as a medicament for the prophylaxis or treatment of a disease or symptom mediated by an increase in RBP4 or retinol supplied by RBP4. A compound represented by the formula (I): wherein each symbol is as defined in the Description, or a salt thereof has a superior RBP4-lowering action, and is useful as a medicament for the prophylaxis or treatment of a disease or symptom mediated by an increase in RBP4 or retinol supplied by RBP4.

Abstract: The present invention provides a heterocyclic compound having an IRAK-4 inhibitory action, which is useful for the prophylaxis or treatment of inflammatory disease, autoimmune disease, osteoarticular degenerative disease, neoplastic disease and the like, and a medicament containing thereof. The present invention relates to a compound represented by the formula (I): wherein each symbol is as defined in the specification, or a salt thereof.

Abstract: The present invention provides a heterocyclic compound having an IRAK-4 inhibitory action, which is useful for the prophylaxis or treatment of inflammatory disease, autoimmune disease, osteoarticular degenerative disease, neoplastic disease and the like, and a medicament containing thereof. The present invention relates to a compound represented by the formula (I): wherein each symbol is as defined in the specification, or a salt thereof.

Abstract: The present invention provides a heterocyclic compound having an IRAK-4 inhibitory action, which is useful for the prophylaxis or treatment of inflammatory disease, autoimmune disease, osteoarticular degenerative disease, neoplastic disease and the like, and a medicament containing thereof. The present invention relates to a compound represented by the formula (I): wherein each symbol is as defined in the specification, or a salt thereof.

Abstract: The present invention provides a compound having a muscle cell or adipocyte differentiation regulating action, useful for the prophylaxis or treatment of diseases such as diabetes, obesity, dyslipidemia and the like, and the like, and having superior efficacy. The present invention provides a compound represented by the formula: wherein each symbol is as defined in the description, or a salt thereof.

Abstract: The present invention provides a compound having a muscle cell or adipocyte differentiation regulating action, useful for the prophylaxis or treatment of diseases such as diabetes, obesity, dyslipidemia and the like, and the like, and having superior efficacy. The present invention provides a compound represented by the formula: wherein each symbol is as defined in the description, or a salt thereof.