Blueberries are grown in many areas worldwide including
North America, Northeast China, and Russia. Blueberry cultivation
is highly favored due to their nutritional value, attractive blue pigment,
and special aroma. Fresh blueberry fruit contain high levels
of phenolic compounds [1,2], especially in anthocyanins [3].
Anthocyanins, which are water-soluble polyphenols with strong
resistance to oxidation [4], potentially have great healthbenefits
[5] such as anti-inflammation [6], fighting cardiovascular disease,
and anti-aging [7]. The molecular structure of anthocyanin consists
of phenolic groups [8], formatted by phenolic hydroxyl and alkyl
groups, as shown in Fig. 1.