Guanidino imidazoles and thiazoles

Claim 1

A guanidine derivative of the formula: ##STR25## in which X is a sulphur atom or NH radical; Y is a direct bond, a methylene radical or a cis- or trans-vinylene radical; m is 0 to 4 and n is 1 to 4; R 1 is a hydrogen or halogen atom or an alkyl radical of 1 to 6 carbon atoms; R 2 is a hydrogen atom, an alkyl radical of 1 to 10 carbon atoms, an alkanoyl radical of 1 to 6 carbon atoms or an aroyl radical of 7 to 11 carbon atoms; A is a 3,4-dioxocyclobuten-1,2-diyl radical or a radical of the formula C═Z in which Z is an oxygen or sulphur atom or a radical of the formula NCN, NNO 2 , CHNO 2 , NCONH 2 , C(CN) 2 , NCOR 3 , NCO 2 R 3 , NSO 2 R 3 or NR 4 in which R 3 is an alkyl radical of 1 to 6 carbon atoms or an aryl radical of 6 to 12 carbon atoms and R 4 is a hydrogen atom or an alkyl radical of 1 to 6 carbon atoms; B is an alkoxy or alkylthio radical of 1 to 6 carbon atoms or a radical of the formula NR 5 R 6 in which R 5 and R 6 , which may be the same or different, are hydrogen atoms, alkyl radicals of 1 to 10 carbon atoms, alkenyl radicals of 3 to 10 carbon atoms in which the double bond is separated from the nitrogen atom of NR 5 R 6 by at least one carbon atom, cycloalkyl radicals of 3 to 8 carbon atoms, (primary hydroxy)alkyl radicals of 2 to 6 carbon atoms in which the oxygen atom is separated from the nitrogen atom of NR 5 R 6 by at least two carbon atoms, alkoxyalkyl radicals of 3 to 10 carbon atoms in which the oxygen atom is separated from the nitrogen atom of NR 5 R 6 by at least two carbon atoms, alkylaminoalkyl radicals of 3 to 10 carbon atoms in which the nitrogen atom is separated from the nitrogen atom of NR 5 R 6 by at least two carbon atoms; or dialkylaminoalkyl radicals of 4 to 10 carbon atoms in which the nitrogen atom is separated from the nitrogen atom of NR 5 R 6 by at least two carbon atoms; and the pharmaceutically acceptable acid-addition salts thereof.