phytochemical study of polyphenols in perilla frutescens as an antioxidant

perilla frutescens is an annual herb of the mint family native to east asia. polyphenols present in perilla have various structural varieties with large diversity of biological activities. it is direct influence the quality of perilla plant and their potential functions. some of these products have been studied and proven to be effective source of phenolic antioxidants. the aqueous extract contains phenolic compounds such as phenolic acids, cinnamic acid derivatives, flavonoids, and lignans. gallic acid, hydroxytyrosol (3,4-dhpea), cinnamic acid derivatives (coumaroyl tartaric acid, caffeic acid and rosmarinic acid), flavonoids, scutellarein 7-o-diglucuronide, luteolin 7-o-diglucuronide, apigenin 7-o-diglucuronide, luteolin 7-o-glucuronide, and scutellarein 7-o-glucuronide), and anthocyanins (mainly cis-shisonin, shisonin, malonylshisonin and cyanidin 3-o-(e)-caffeoylglucoside-5-o-malonylglucoside) are present.