Polyprenols are long-chain isoprenoid alcohols. The general formula for polyprenols is H-(C5H8)n-OH, where n refers to the number of isoprene units. Polyprenols are classified into three types: all-trans (solanesol-type), two-trans (Solanesol-type) and poly-cis (Betulaprenol-type), and three-trans and poly-cis (Ficaprenol-type). Despite their low content, polyprenols are natural bioregulators present in many plant tissues.