These novel plant enzymes might potentially be associated with biosynthesis of natural tricyclic aromatic quinines in Aloe, but it remains unclear whether these enzymes produce end products such as Aloe-emodin and chrysophanol in vivo. Aloesin, aloin and Aloe-emodin (oxidative product of aloin) are the most important secondary metabolites found in A. vera gel. Many secondary metabolites in plants have reported potent antiinflammatory, lipid lowering, and antioxidant activities. However, no reports have elucidated complete entire secondary metabolites present in the plant species.