Sulfonamidines, process for the production thereof and pharmaceutical compositions containing the same

A compound of the formula (I):

• R--NH--CH.dbd.N--SO.sub.2 --R.sub.1 (I)
• wherein R is a group selected from 2-[[(5-methyl-1H-imidazole-4-yl)methyl]thio]ethyl, 2-[[[5-[(dimethylamino)methyl]-2-furanyl]methyl]thio]ethyl, 2-[[[2-[(aminoiminomethyl)amino]-4-thiazolyl]methyl]thio]ethyl or 3-[3-(1-piperidinylmethyl)phenoxy propyl and R.sub.1 is lower alkyl having 4 carbon atoms at most, phenyl optionally substituted by lower alkyl having 4 carbon atoms at most, halogen, nitro, lower alkoxy having 4 carbon atoms at most, lower alkanoylamino having 4 carbon atoms at most, carboxylic acid, lowr alkoxycarbonyl the alkoxy group of which having 4 carbon atoms at most, lower dialkylamino the alkyl groups of which having 4 carbon atoms each at most, lower alkylsulphonyl the alkyl group of which having 4 carbon atoms at most, lower alkylsulphonylamino the alkyl group of which having 4 carbon atoms at most, lower alkylthio the alkyl group of which having 4 carbon atoms at most or 1,3,4-thiadiazole-2-yl, with or without being substituted by lower alkanoylamino having 4 carbon atoms at most and the pharmaceutically acceptable salts thereof.