Abstract: [Problem] To provide a compound which is useful as an agent for preventing and/or treating kidney diseases. [Means for Solution] The present inventors have studied compounds having a trypsin inhibitory activity, and have confirmed that a guanidinobenzoic acid ester compound has a trypsin inhibitory activity, thereby completing the present invention. The guanidinobenzoic acid ester compound of the present invention can be used as an agent for preventing and/or treating kidney diseases (for example, chronic kidney disease, acute glomerulonephritis, acute kidney injury, and the like) as an agent which will substitute low-protein diet therapy, and/or as an agent for preventing and/or treating trypsin-related diseases (for example, chronic pancreatitis, gastroesophageal reflux disease, hepatic encephalopathy, influenza, and the like).

Abstract: [Problem]To provide a compound which is useful as an agent for preventing and/or treating kidney diseases. [Means for Solution]The present inventors have studied compounds having a trypsin inhibitory activity, and have confirmed that a guanidinobenzoic acid ester compound has a trypsin inhibitory activity, thereby completing the present invention. The guanidinobenzoic acid ester compound of the present invention can be used as an agent for preventing and/or treating kidney diseases (for example, chronic kidney disease, acute glomerulonephritis, acute kidney injury, and the like) as an agent which will substitute low-protein diet therapy, and/or as an agent for preventing and/or treating trypsin-related diseases (for example, chronic pancreatitis, gastroesophageal reflux disease, hepatic encephalopathy, influenza, and the like).

Abstract: [Problem] Provided is a compound which is useful as an agent for preventing and/or treating renal diseases. [Means for Solution] The present inventors have conducted extensive studies on compounds having a trypsin inhibitory action, and as a result, they have found that a guanidinobenzoic acid compound has a trypsin inhibitory action, thereby completing the present invention. The guanidinobenzoic acid compound of the present invention can be used as an agent for preventing and/or treating renal disease as an agent which will substitute low-protein diet therapy, and an agent for preventing and/or treating trypsin-related diseases, for example, pancreatitis, gastroesophageal reflux disease, hepatic encephalopathy, influenza, and the like.

Abstract: [Problem] Provided is a compound which is useful as an agent for preventing and/or treating renal diseases. [Means for Solution] The present inventors have conducted extensive studies on compounds having a trypsin inhibitory action, and as a result, they have found that a guanidinobenzoic acid compound has a trypsin inhibitory action, thereby completing the present invention. The guanidinobenzoic acid compound of the present invention can be used as an agent for preventing and/or treating renal disease as an agent which will substitute low-protein diet therapy, and an agent for preventing and/or treating trypsin-related diseases, for example, pancreatitis, gastroesophageal reflux disease, hepatic encephalopathy, influenza, and the like.

Abstract: [Object] Disclosed is a compound useful as an active ingredient for a pharmaceutical composition having an ?-amylase inhibitory activity, particularly a pharmaceutical composition for the treatment of diabetes. [Solution] An investigation has been made on a compound having an ?-amylase inhibitory activity among the compounds produced by Streptomyces sp. strain 6982, which is a actinomycetes belonging to the genus Streptomyces, and it was confirmed that an aminosugar compound has an ?-amylase inhibitory activity, thus completing the invention. The aminosugar compound of the present invention has an ?-amylase-inhibitory activity, and therefore can be used as a prophylactic or therapeutic agent for diabetes, obesity, NASH (non-alcoholic steatohepatitis), particularly as an ameliorating agent for postprandial blood glucose elevation.

Abstract: A cyclic peptide compound of the following general formula (I): Wherein R1, R2 and R3 are defined in the description, or a salt thereof. The compound (I) is useful for the prophylactic and/or therapeutic treatment of hepatitis C.

Abstract: A cyclic peptide compound of the following general formula (I): Wherein R1, R2 and R3 are defined in the description, or a salt thereof. The compound (I) is useful for the prophylactic and/or therapeutic treatment of hepatitis C.