C07C279/00—Derivatives of guanidine, i.e. compounds containing the group, the singly-bound nitrogen atoms not being part of nitro or nitroso groups
C07C279/20—Derivatives of guanidine, i.e. compounds containing the group, the singly-bound nitrogen atoms not being part of nitro or nitroso groups containing any of the groups, X being a hetero atom, Y being any atom, e.g. acylguanidines
C07C279/24—Y being a hetero atom
C07C279/26—X and Y being nitrogen atoms, i.e. biguanides
C07C279/265—X and Y being nitrogen atoms, i.e. biguanides containing two or more biguanide groups