| abstract |
Alkylene(cycloalkylene)-bis-heterocyclyl-biguanides of the formula <IMAGE> in which A and B each independently is a nitrogen-containing heterocyclic radical which is linked via a nitrogen atom, R is an optionally alkyl-substituted cycloalkylene radical, or an alkylene radical which is optionally substituted by cycloalkylene, bicycloalkylene, tricycloalkylene, oxygen, sulphur or the NR3 group, R1 and R2 each independently is hydrogen, alkyl or optionally substituted aralkyl, or R1 and R2 together with the two nitrogen atoms on which they are located and R form a heterocyclic ring, and R3 is hydrogen, alkyl or optionally substituted aralkyl, or salts thereof which possess fungicidal activity. |