Identification of Novel Poly-Acylated Anthocyanins from Gynura bicolor Leaves and Their Antioxidative Activity

Gynura bicolor DC. is a traditional vegetable in Japan and its leaves are characterized by the fact that their adaxial and abaxial sides are green and reddish purple, respectively. Two novel poly-acylated anthocyanins (bicolnin and bicolmalonin) and a known one (rubrocinerarin) were isolated from the leaves of G. bicolor as major anthocyanins. These anthocyanins were identified to be cyanidin...