Abstract: Phenyldifluoromethyl-substituted prolinamide compounds that have a cathepsin S inhibitory effect, and are usable as active ingredients of pharmaceutical compositions for preventing and/or treating autoimmune diseases including systemic lupus erythematosus (SLE) and lupus nephritis, allergies, or graft rejection of an organ, bone marrow or tissue.

Abstract: Phenyldifluoromethyl-substituted prolinamide compounds that have a cathepsin S inhibitory effect, and are usable as active ingredients of pharmaceutical compositions for preventing and/or treating autoimmune diseases including systemic lupus erythematosus (SLE) and lupus nephritis, allergies, or graft rejection of an organ, bone marrow or tissue.

Abstract: Phenyldifluoromethyl-substituted prolinamide compounds that have a cathepsin S inhibitory effect, and are usable as active ingredients of pharmaceutical compositions for preventing and/or treating autoimmune diseases including systemic lupus erythematosus (SLE) and lupus nephritis, allergies, or graft rejection of an organ, bone marrow or tissue.

Abstract: [Problem] To provide a compound useful as a cathepsin S inhibitor. [Means for Solution] The present inventors have examined a compound that has a cathepsin S inhibitory effect and is usable as an active ingredient of a pharmaceutical composition for preventing and/or treating autoimmune disease including systemic lupus erythematosus (SLE) and lupus nephritis, allergies, or graft rejection of an organ, bone marrow or tissue, and have found that a phenyldifluoromethyl-substituted prolinamide compound of the present invention has the cathepsin S inhibitory effect, thereby completing the present invention. The phenyldifluoromethyl-substituted prolinamide compound of the present invention has the cathepsin S inhibitory effect and is useful as an agent for preventing and/or treating autoimmune disease including SLE and nephritis, allergies, or graft rejection of an organ, bone marrow or tissue.

Abstract: The present invention relates to a new cyclic peptide compound or a salt thereof, which has anti-hepatitis C virus activities based on inhibitory activity against the RNA replication of hepatitis C virus replicon, a process for preparation thereof, a pharmaceutical composition comprising the same, and a method for prophylactic and/or therapeutic treatment of hepatitis C in a human being or an animal.

Abstract: The present invention relates to a new cyclic peptide compound or a salt thereof, which has anti-hepatitis C virus activities based on inhibitory activity against the RNA replication of hepatitis C virus replicon, a process for preparation thereof, a pharmaceutical composition comprising the same, and a method for prophylactic and/or therapeutic treatment of hepatitis C in a human being or an animal.