The invention relates to a method for producing cyclohexadecanone by hydrogenating cyclohexadecenone, to mixtures of aromatic substances, and to products containing the inventive cyclohexadecanone. The track release mechanism includes a drive arm configured for movement between a first position and a second position. The two-dimensional PDF eye diagram is processed to generate a two-dimensional Bit Error Rate eye array. The third supporting tube has an inner circumferential surface with a low reflectivity.