C-glycosides and preparation of thereof as antidiabetic agents

Abstract

C-glycoside derivatives are disclosed, which are represented by the following formula (I) and its pharmaceutical acceptable salt, and which are useful for the treatment and/or prevention of diabetes and hypoglycemia. wherein: with the provisos that R1 is H, OH, lower alkyl, O-lower alkyl or R2 is H, —COO-lower alkyl, R5 is —CH2OH, —CH2OCO2-lower alkyl, —CH2OSO3H, —COOH or —COONa; wherein: A is (with the provisos that X is oxygen atom, nitrogen atom or sulfur atom R3 is lower alkyl when m=0, and is lower alkyl, —OH or —O-lower alkyl when m=1, . . . means saturated or unsaturated carbon bond; m is 0 or 1; n is 0, 1 or 2; above mentioned-lower alkyl means C1-C5.) or a pharmaceutical acceptable salt.

Dependencies are inferred from the claim text.