图4. 金属花青苷组分结构(Yoshida et al., 2009b) A1-A4为花青苷类物质; F1-F4为黄酮类物质。
Figure 4. Structure of metalloanthocyanin component (Yoshida et al., 2009b) A1-A4 are anthocyanins; F1-F4 are flavonoids.