Abstract: 2-Acylaminothiazole derivatives or salts thereof which have a platelet increasing activity based on an excellent human c-mpl-Ba/F3 cell growth function and a function of accelerating formation of megakaryocytic colonies and which are useful for treating thrombocytopenia are provided.

Abstract: To provide a compound which has an anticoagulation action based upon inhibition of activated blood coagulation factor X and is useful as an anticoagulant or an agent for prevention and treatment of diseases caused by thrombus or embolus. A diazepan derivative such as 4-[(3-carbamimidoylphenylamino)methyl]-3-[4-(4-methyl-1,4-diazepan-1-yl)benzoylamino]benzoic acid and 3-hydroxy-4?-methoxy-2-{[4-(4-methyl-1,4-diazepan-1-yl)benzoyl]amino}benzanilide or a salt thereof is an effective ingredient.

Abstract: 2-Acylaminothiazole derivatives or salts thereof which have a platelet increasing activity based on an excellent human c-mpl-Ba/F3 cell growth function and a function of accelerating formation of megakaryocytic colonies and which are useful for treating thrombocytopenia are provided.

Abstract: A platelet aggregation inhibitor comprising a quinolone derivative or a pharmaceutically acceptable salt thereof as an active ingredient, and a novel quinolone derivative or a pharmaceutically acceptable salt thereof useful as a platelet aggregation inhibitor.

Abstract: A 2-acylaminothiazole derivative or a pharmaceutically acceptable salt thereof having an excellent effect of proliferating human c-mpl-Ba/F3 cells and an activity of increasing platelets based on the effect of promoting the formation of megakaryocytic colonies. A compound or a pharmaceutically acceptable salt thereof useful in treating thrombocytopenia.

Abstract: There are provided compounds having an anticoagulant action on the basis of inhibition of activated blood coagulation factor X and being useful as anticoagulants or preventive/therapeutic agents for diseases induced by thrombosis or embolism. Effective ingredients are the compounds such as 4′-bromo-2′-[(5-chloro-2-pyridyl)carbamoyl]-6′-&bgr;-D-galactopyranosyloxy-1-isopropylpiperidine-4-carboxanilide, 2′-(2-acetamido-2-deoxy-&bgr;-D-glucopyranosyloxy)-4′-bromo-6′-[(5-chloro-2-pyridyl)carbamoyl]-1-isopropylpiperidine-4-carboxanilide, etc. or salts thereof.

Abstract: To provide a compound which has an anticoagulation action based upon inhibition of activated blood coagulation factor X and is useful as an anticoagulant or an agent for prevention and treatment of diseases caused by thrombus or embolus. A diazepan derivative such as 4-[(3-carbamimidoylphenylamino)methyl]-3-[4-(4-methyl-1,4-diazepan-1-yl)benzoylamino]benzoic acid and 3-hydroxy-4′-methoxy-2-{[4-(4-methyl-1,4-diazepan-1-yl)benzoyl]amino}benzanilide or a salt thereof is an effective ingredient.

Abstract: To provide a compound which has an anticoagulation action based upon inhibition of activated blood coagulation factor X and is useful as an anticoagulant or an agent for prevention and treatment of diseases caused by thrombus or embolus. A diazepan derivative such as 4-[(3-carbamimidoylphenylamino)methyl]-3-[4-(4-METHYL-1,4-diazepan-1-yl)benzoylamino]benzoic acid and 3-hydroxy-4′-methoxy-2-{[4-(4-methyl-1,4-diazepan-1-yl)benzoyl]amino}benzanilide or a salt thereof is an effective ingredient.

Abstract: To provide a compound which has an anticoagulation action based upon inhibition of activated blood coagulation factor X and is useful as an anticoagulant or an agent for prevention and treatment of diseases caused by thrombus or embolus. A diazepan derivative such as 4-[(3-carbamimidoylphenylamino)methyl]-3-[4-(4-methyl-1,4-diazepan-1-yl)benzoylamino]benzoic acid and 3-hydroxy-4′methoxy-2-{[4-(4-methyl-1,4-diazepan-1-yl)benzoyl]amino}benzanilide or a salt thereof is an effective ingredient.

Abstract: Hexahydro-1,4-diazepine derivatives represented by general formula (I); pharmaceutically acceptable salts thereof; and drugs containing the same as the active ingredient, such as activated blood coagulation factor X inhibitor, wherein A: phenylene, pyridylene, or the like; B: a 5- or 6-membered aryl or heteroaryl ring; X: —CO—, —CONH—, —CSNH—, —SO2—, —SO2NH—, or the like; Y: a bond or alkylene; R1: hydrogen, alkyl, —Y—(hetero) aryl, or the like; R2: hydrogen, alkoxy, —COOH, or the like; R3: amidino or a group capable of being converted into amidino; and R4, R5: each independently hydrogen or lower alkyl.

Abstract: An amidinonaphthyl derivative represented by the following general formula (I) which has coagulation factor X inhibiting action and is useful as an anti-thrombus agent and the like, a salt thereof, an intermediate thereof and a pharmaceutical composition which comprises the amidinonaphthyl derivative. An amidinonaphthyl derivative represented by the following general formula (I) or a pharmaceutically acceptable salt thereof. ##STR1## (symbols in the formula have the following meanings; R.sup.1 : a hydrogen atom or a group represented by the formula --A--W--R.sup.4,A: a group represented by the formula ##STR2## a group represented by the formula ##STR3## or a group represented by the formula --SO.sub.2 --, X: an oxygen atom or a sulfur atom, W: a single bond or a group represented by the formula --NR.sup.5 --, R.sup.4 : a hydroxyl group, a lower alkoxy group, etc., R.sup.5 : a hydrogen atom, a carbamoyl group, a lower alkoxycarbonyl group, etc., R.sup.2 : a lower alkyl group, R.sup.

Abstract: Sulfated tannins or salts thereof are herein disclosed. These compounds can be prepared by a method which comprises reacting tannin with a sulfonating agent under a basic condition. These compounds show antiviral activity and reverse transcriptase inhibitor, effects and can be used to treat patients infected with a variety of virus such as AIDS virus, herpesvirus, influenza virus or rhinovirus.