1.2 Flavonoids
The Morus plants are known to be abundant in flavonoids and are shown in figure 2. The flavonoids in the mulberry leaves are mainly in the forms of quercitin and kaempferol [12]. Kuwanons, moracinflavans, moragols andmorkkotins are some of the main flavonoids found in mulberry leaves. The total contents of isoquercetin, rutin, kaempferol and astragalin are ranging from 4.34 mg/g to 0.53 mg/g [13].The major antioxidant flavonoids are flavonol, glycosides, rutin, quercitin-3-(6-malonylglucoside) and isoquercitin have been extracted from the leaves of mulberry [4]. The flavonoids possess many medicinal properties like anti-inflammatory, antioxidant, antiallergic, antithrombotic, hepatoprotective, antiviral and carcinogenic in human being.