Insect growth regulators. XXV. Chemical approach to the correlation of dynamic structure and biological activity of juvenile hormone analogues.

On the basis of flexibility of the carbon skeleton of a juvenoid molecule, an analysis of its steric properties required to induce a biological effect in insects Dysdercus cingulatus and Tenebrio molitor, is presented. Steric analyses of "branched" juvenoids and some derivatives of farnesoic acid differing in position of the double bonds, are also described.