methylguanidine derivatives, processes for their preparation and compositions containing them.

The invention relates to derivatives of methylguanidine used as medicaments, of the general formula: (CF DRAWING IN BOPI) wherein: An asterisk indicates a carbon asymmetric. R1, R2 and R3, identical or different, represent hydrogen, halogen, alkyl C1 -C4, alkoxy C1 -C4, phenyl or benzyl, or R1, R2 and R3, taken together with the carbon atoms located in positions 5 and 6 form a C4 -C6 ring, R4 and R5, identical or different, represent: - hydrogen - alkyl C1 - C1 2 - a benzhydryl group - an aralkyl group optionally substituted - substituted alkyl group of formula: (CF DRAWING iN BOPI) represents hydrogen or an alkyl group C 1 -C 4 and n is 0 to 3, Cy represents an optionally substituted ring system (CF DRAWING iN BOPI)