(7)The measures applicable to sassafras oil are currently interpreted in different ways in the Community, since in some Member States it is regarded as a mixture containing Safrole and is therefore controlled, while other Member States regard it as a natural product not subject to controls. Inserting a reference to natural products in the definition of "scheduled substances" will resolve this discrepancy and therefore allow controls to be applied to sassafras oil; only natural products from which scheduled substances can be extracted easily should be covered by the definition.