NOUVEAUX DERIVES DE POLYHYDROXYPYRAZINES, LEUR PREPARATION ET LES COMPOSITIONS PHARMACEUTIQUES QUI LES CONTIENNENT

摘要

The invention concerns novel derivatives of formula (I) wherein: R1 represents the stereoisomerical forms of the chain -(CHOH)3-CH2-O-COR (II) and either R2 represents a hydrogen atom and R3 represents the stereoisomerical forms of the chain -CH2-(CHOH)2-CH2-O-COR (III) or R2 represents the stereoisomerical forms of the chains -(CHOH)3-CH2-O-COR (II) or -CH2-(CHOH)2-CH2-O-COR (III) and R3 represents a hydrogen atom and R represents -(Alk)i-(Cycloalk) radical; i is equal to 0 or 1; Alk represents an alkyl radical, Cycloalk represents a cycloalkyl radical, and their salts with a mineral or organic acid, their preparation and the medicines containing as active principle at least a product of general formula (I) or its salts with a mineral or organic acid.