Figure 1.

Separation of the aqueous extract of Litchi pericarp by column chromatography. (a) The crude aqueous extract was first loaded on the AmberliteXAD-7 resin column and eluted by methanol with 0.1% (v/v) HCl, and absorbance at 510 nm (A510) of the fractions was monitored; (b) The red fractions in (a), with high A510, were combined and separated by the Sephadex LH-20 column. F1 (tube number 1–60), F2 (61–91) and F3 (92–130) fractions were combined respectively according to their absorbance at 510 nm.