-Isoprenoids are also known as terprenoids and widely distributed in nature. They are found in all the kingdoms where they develop multiple functions (hormones, pigments, phytoalexins). These pigments are brilliant red, pink, orange and yellow.
-Carotenoids are compounds constituted by eight isoprenoid units which are joined in a head to tail pattern. They classified into 2 groups: carotenes and xanthophylls