Heterocyclic derivatives based on N6-substituted adenine of, e.g.,a formula: wherein R2 is hydrogen, R6 is R6-X, X is -NH-, and R6 is substituted phenyl or substituted benzyl. The derivatives possess anticancer, mitotic, imunosuppressive and antisenescent properties for plant, animal and human cells, and methods of their preparation are disclosed. Included are also pharmaceutical compositions, cosmetic preparations and growth regulators, which contain these derivatives as active compound and the use of these derivatives for the preparation of drugs, cosmetic preparations, in biotechnological processes, in cosmetics and in agriculture.
