Abstract: Provided are 1-N-aminobenzimidazole derivatives represented by the following formula (I): wherein R1 and R2 each represents a substituted or unsubstituted alkyl group or the like, R3, R5 and R6 each represents an alkyl group, alkoxy group, hydrogen atom or the like, R4 represents a substituted or unsubstituted alkyl group or the like, A represents a benzene ring or the like, B represents a hydrogen atom or the like, an n stands for an integer of from 0 to 2, or salts thereof; and medicines containing them. The compounds (I) according to the present invention do not bring about much individual differences in therapeutic effects despite the existence of individual differences in the CYP2C19 activity. At the same dose, they can hence bring about appropriate therapeutic effects for all patients. In addition, they are low in the risk of induction of an interaction or a cancer caused by induction of the CYP1A family.

Abstract: A benzimidazole derivative of formula (1): (wherein R represents a hydrogen atom or a methoxy group, and n is 0 or 1) or a salt thereof; and a medicament containing the same. The compounds of the present invention, due to minimized difference in therapeutic effect between subjects, which difference would otherwise be derived from different CYP2C19 activity from subject to subject, ensure that all patients can enjoy proper therapeutic effects at the same dose of the drug. Also, the compounds of the invention have low risk of drug interaction caused by induction of CYP1A family member enzymes, as well as low risk of development of cancer, and thus is useful as a remedy for peptic ulcer, reliably providing therapeutic effects with safety.

Abstract: Remedies effective for the improvement of colonic motor dysfunction such as irritable bowel syndrome, constipation or intestinal atony without causing side effects on the central nerve system. These colonic motor dysfunction remedies comprise, as active ingredients, aminothiazole derivatives represented by the following formula (I) or a salt or hydrate thereof: wherein R1, R2 and R3 may be the same or different and each independently represent a hydrogen atom or a hydroxyl, lower alkyl, lower alkoxy, amino, nitro or cyano group, R4 and R5 may be the same or different and each independently represent a hydrogen atom or a lower alkyl group, and n stands for an integer of from 2 to 4.

Abstract: A benzimidazole derivative of formula (1): 1

Abstract: Remedies effective for the improvement of colonic motor dysfunction such as irritable bowel syndrome, constipation or intestinal atony without causing side effects on the central nerve system. These colonic motor dysfunction remedies comprise, as active ingredients, aminothiazole derivatives represented by the following formula (I) or a salt or hydrate thereof: wherein R1, R2 and R3 may be the same or different and each independently represent a hydrogen atom or a hydroxyl, lower alkyl, lower alkoxy, amino, nitro or cyano group, R4 and R5 may be the same or different and each independently represent a hydrogen atom or a lower alkyl group, and n stands for an integer of from 2 to 4.

Abstract: Remedies effective for the improvement of colonic motor dysfunction such as irritable bowel syndrome, constipation or intestinal atony without causing side effects on the central nerve system.

Abstract: The present invention is directed to a process for producing 2-hydroxybenzamide derivatives (2) or (5) according to either one of the following reaction schemes.

Abstract: The present invention relates to an aminothiazole derivative represented by the following formula (I): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 each independently represents a hydrogen atom, a hydroxy group, a lower alkyl group, a lower alkoxy group or the like; R.sup.4 represents a hydrogen atom or a lower alkyl group; R.sup.5 represents a hydrogen atom, a halogen atom or a lower alkyl group; m stands for an integer of 0 to 4, A represents a substituted amino group, a substituted imino group, a heterocyclic group or the like; and B stands for an imino group or an oxygen atom, a medicament containing it and an intermediate for the preparation of said compound. The compound has strong restoration effects on dysmotility in the gastrointestinal tract and at the same time has high safety so that it is useful as an excellent gastroprokinetic.

Abstract: Arylalkanoylamine derivatives having excellent prolyl endopeptidase inhibitory action and resistances to hypoxia and amnesia which are represented by the following general formula (I): ##STR1## wherein A represents an indanyl, indenyl, 1,2,3,4-tetrahydronaphthalenyl or benzofuranyl group; m represents an integer of 0 to 5; Z represents a hydroxymethyl, formyl, nitrile, hydroxyiminomethyl, semicarbazonomethyl or dialkoxymethyl group; X and Y may be the same or different, and individually represent a methylene group or sulfur atom, wherein compounds defined by the following substituents are excluded: A represents an indanyl, indenyl, or 1,2,3,4-tetrahydronaphthalenyl group; X and Y each represent a methylene group; and Z represents a hydroxymethyl or formyl group. Also disclosed is a pharmaceutical composition and method for improving mneme, cerebral circulation and cerebral metabolism comprising the arylalkanoylamine derivatives as the effective ingredient.