Table 1. The chemical structures of 30 flavonoids.

Cglc: -C-glucopyranosyl; Oglc: -O-glucopyranosyl; OglcA: -O- glucuronyl; Orha: -O-α-L-rhamnopyranosyl; RG: -(6-O-(6-deoxy-α-L- mannopyranosyl)-β-D-glucopyranosyloxy); NG: -(2-O-(6-deoxy-α-L-mannopyranosyl)- β-D- glucopyranosyloxy); t: Test set.