Abstract: An N-containing five-membered ring compound of formula (I) wherein all symbols are the same as described in the specification, and a non-toxic salt thereof. The compound of formula (I) has an inhibitory activity against cysteine protease and therefore it is useful as an agent for the prophylaxis and/or treatment of inflammatory diseases, diseases induced by apoptosis, diseases induced by disorders of immune responses, autoimmune diseases, diseases induced by decomposition of proteins which compose organism, shock, circulatory system disorders, blood coagulation systems disorders, malignant tumors, acquired immune deficiency syndrome (AIDS) and AIDS-related complex (ARC), parasitic diseases, nerve degeneration diseases, pulmonary disorders, bone resorption diseases, endocrinesthenia, etc.

Abstract: An N-containing five-membered ring compound of formula (I) wherein all symbols are the same as described in the specification, and a non-toxic salt thereof. The compound of formula (I) has an inhibitory activity against cysteine protease and therefore it is useful as an agent for the prophylaxis and/or treatment of inflammatory diseases, diseases induced by apoptosis, diseases induced by disorders of immune responses, autoimmune diseases, diseases induced by decomposition of proteins which compose organism, shock, circulatory system disorders, blood coagulation systems disorders, malignant tumors, acquired immune deficiency syndrome (AIDS) and AIDS-related complex (ARC), parasitic diseases, nerve degeneration diseases, pulmonary disorders, bone resorption diseases, endocrinesthenia, etc.

Abstract: The present invention relates to the compound presented by formula (I) (wherein all symbols in formula (I) are the same mean as the description shown in the specification.), mitocondorial benzogeazepin receptor (MBR) antagonist comprising the compound, the preventive and/or treatment medicine against diseases caused by stress of which an active ingredient is the compound. Since the compound represented by formula (I) has MBR antagonistic activity, and controls the production of neurosteroid, it is useful as the preventive and/or treatment medicine against diseases caused by stress.

Abstract: A benzene-fused heteroring derivative of formula (I) wherein all symbols are the same as described in the specification, and a non-toxic salt thereof. The compound of formula (I) has an inhibitory activity against cysteine protease and therefore it is useful as an agent for the prophylaxis and/or treatment of immune diseases (autoimmune diseases, infectious diseases, etc.), inflammatory diseases (inflammatory bowel diseases, multiple cerebrosclerosis, arthritis, etc.), nerve degeneration diseases (Alzheimer's disease, muscular dystrophy, etc.), bone resorption diseases (osteoporosis, etc.), respiratory system diseases, diabetes, shock, etc.

Abstract: A benzene-fused heteroring derivative of formula (I) wherein all symbols are the same as described in the specification, and a non-toxic salt thereof. The compound of formula (I) has an inhibitory activity against cysteine protease and therefore it is useful as an agent for the prophylaxis and/or treatment of immune diseases (autoimmune diseases, infectious diseases, etc.), inflammatory diseases (inflammatory bowel diseases, multiple cerebrosclerosis, arthritis, etc.), nerve degeneration diseases (Alzheimer's disease, muscular dystrophy, etc.), bone resorption diseases (osteoporosis, etc.), respiratory system diseases, diabetes, shock, etc.

Abstract: An oxadiazole derivative of formula (I) and a non-toxic salt thereof, 1

Abstract: A 1,3,4-oxadiazoline derivative of formula (I) wherein W is oxygen, sulfer; R is hydrogen, alkyl, CycA, etc.; AA1 is a single bond, amino acid residue, etc.; AA2 is a single bond, amino acid residue, etc.; R7 and R8 are hydrogen, alkyl, etc.; R9 is hydrogen, alkyl, etc., and a non-toxic salt thereof. The compound of formula (I) has an inhibitory activity against cysteine protease and therefore it is useful as an agent for the prophylaxis and/or treatment of inflammatory diseases, diseases induced by apoptosis, diseases induced by disorders of immune responses, autoimmune diseases, diseases induced by decomposition of proteins which compose organism, shock, circulatory system disorders, blood coagulation systems disorders, malignant tumors, acquired immune deficiency syndrome (AIDS) and AIDS-related complex (ARC), parasitic diseases, nerve degeneration diseases, pulmonary disorders, bone resorption diseases, endocrinesthenia, etc.

Abstract: Type-2 crystals of 2-[5-amino-6-oxo-2-phenyl-1,6-dihydro-1-pyrimidyl]-N-[1 -(2-[5-t-butyl-1,3,4-oxadiazolyl]carbonyl)-2-(R,S)-methylpropyl]acetamide represented by formula (I), a process for producing the same, and a pharmaceutical agent containing the same as an active ingredient.

Abstract: The present invention relates to certain substituted oxadiazole peptoids and nonpeptoids useful as inhibitors of serine proteases, especially human neutophil elastase (HNE). Compounds of the present invention are useful for the treatment or amelioration of symptoms of adult respiratory distress syndrome, septic shock, and multiple organ failure. Processes mediated by HNE are also implicated in conditions such as arthritis, periodontal disease, glomerulonephritis, and cystic fibrosis.

Abstract: A 1,3,4-oxadiazoline derivative of formula (I) 1

Abstract: An oxadiazole derivative of formula (I) and a non-toxic salt thereof, 1

Abstract: A benzene-fused heteroring derivative of formula (I) 1

Abstract: Oxadiazole derivatives represented by formula (I): 1

Abstract: An N-containing five-membered ring compound of formula (I) 1

Abstract: 1

Abstract: The present invention relates to certain substituted oxadiazole peptoids and nonpeptoids useful as inhibitors of serine proteases, especially human neutophil elastase (HNE). Compounds of the present invention are useful for the treatment or amelioration of symptoms of adult respiratory distress syndrome, septic shock, and multiple organ failure. Processes mediated by HNE are also implicated in conditions such as arthritis, periodontal disease, glomerulonephritis, and cystic fibrosis.

Abstract: Oxadiazole derivatives represented by formula (I): (wherein R1 represents a hydrogen atom or an amino-protective group; R2, R3, and R4 each independently represents an alkyl group, a cycloalkyl group, a phenyl group which may be substituted, or a 3,4-methylenedioxyphenyl group, or R3 and R4 are taken together to represent a C2-6 alkylene group), a process of producing the same, and a process for producing oxadiazole derivatives represented by formula (II): (wherein all symbols have the same meanings as described above) using the above derivative. According to the invention, the compound represented by formula (II) is produced through fewer steps in a high yield.

Abstract: A tetrazole derivatives of formula (I) wherein R1 is H, alkyl, alkoxy, carbocyclic ring, hetero ring, alkyl or alkoxy substituted by carbocyclic ring or hetero ring, etc.; AA1 is bond or  AA2 is bond or  AA1 and AA2, together, may have the formula (a);  Y is the formula (b) (in which Tet ring is tetrazole; Z is alkylene, alkenylene, O, S, SO, SO2, NR26, methylene in alkylene replaced by O, S, —SO—, —SO2— or —NR26—; E is H, alkyl, COOR27 or  in which Cyc is carbocyclic ring or hetero ring); a non-toxic salt thereof, an acid addition salt thereof or a hydrate thereof which has a pharmaceutical agents as an active ingredient. The compound of the formula (I) has an inhibitory effect on interleukin-1&bgr; converting enzyme, therefore, they are useful for prevention and/or treatment of various kinds of inflammatory disease.

Abstract: The present invention relates to certain substituted oxadiazole peptoids and nonpeptoids useful as inhibitors of serine proteases, especially human neutophil elastase (HNE). Compounds of the present invention are useful for the treatment or amelioration of symptoms of adult respiratory distress syndrome, septic shock, and multiple organ failure. Processes mediated by HNE are also implicated in conditions such as arthritis, periodontal disease, glomerulonephritis, and cystic fibrosis.

Abstract: The present invention relates to certain substituted oxadiazole peptoids and nonpeptoids useful as inhibitors of serine proteases, especially human neutophil elastase (HNE). Compounds of the present invention are useful for the treatment or amelioration of symptoms of adult respiratory distress syndrome, septic shock, and multiple organ failure. Processes mediated by HNE are also implicated in conditions such as arthritis, periodontal disease, glomerulonephritis, and cystic fibrosis.