Cyanidin 3-sophoroside-5-glucoside is the main anthocyanin in purple-fleshed sweet potato and affects the antioxidant activity of purple-fleshed sweet potato[1].
References
[1] Zhu F, et al. Anthocyanins, hydroxycinnamic acid derivatives, and antioxidant activity in roots of different Chinese purple-fleshed sweetpotato genotypes[J]. Journal of Agricultural and Food Chemistry, 2010, 58(13): 7588-7596.