 Dimethylallyl diphosphate A and isopentyl diphosphate B come together to form polyisoprenyl diphosphate C. With the addition of p-hydroxybenzoic acid, the product that arises is 3-polyprenyl-4-hydroxybenzoic acid D. The next three steps of synthesis varies between different organisms, but molecule E is made across all organisms and through oxidation, demethyldemethoxyubiquinone (DDMQ) is eventually formed.Rhodoquinone has been theorized to be synthesized from DDMQn, DMQn, DMeQn, and ubiquinone, as shown with the dashed arrows.Recent studies have shown that path D- RQ biosynthesis via UQ, seems to be the most likely route.