Ludwig Heumann & Co. Gmbh

Edgar Fritschi

Kurt H Ahrens

Walter Otto Liebenow

Jaroslav Prikryl

Manfred Haake

Reinhold Pothmann

A compound selected from a 2,4-diamino-5-thiobenzylpyrimidine of the formula: ##STR1## in which R is selected from hydrogen, alkyl, lower alkoxy, and halogen and R' is alkyl; and pharmacologically acceptable acid addition salts thereof. These compounds have an anti-bacterial action and are sulphonamide potentiators.

2,4-Diamino-5-(4'-methylthio)benzylpyrimidenes, compounds, compositions

This invention provides compounds of the general formula I ##STR1## wherein R.sup.1 and R.sup.2 independently represent groups selected from the group consisting of straight chain alkyl groups; branched chain alkyl groups; aryl groups; optionally substituted aryl groups and the groups required to complete a ring system together with the sulphur atom;

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Roethenbach, Germany

Edgar Fritschi