Figure represents the molecular structure of coenzyme Q10 (2,3-dimethoxy-5-methyl-6-decaprenyl-1,4-benzoquinone). This is one of the molecules, which is incorporated into cyclodextrins in order to improve its physico-chemical properties, its antioxidant activities and bioavailability. More details are presented by Šmidovnik et al. p. 9.