Optimization Studies on the Extraction of Flavone Di-C-glycosides from Premna fulva Craib by Deep Eutectic Solvents

Figure 3

Extraction efficiency of the different DESs for flavone di-C-glycosides from Premna fulva Craib. The labels on the horizontal axis correspond to those given in Table 1. Error bars indicate the standard deviation (n = 3). The extraction efficiency of different DESs compared with CON is indicated with , , and . CON: 40% ethanol. (a) Apigenin 6,8-di-C-β-D-glucopyranoside. (b) Apigenin 6-C-β-D-xylopyranosyl -8-C-β-D-glucopyranoside. (c) Apigenin 6-C-β-D-xylopyranosyl-8-C-β-D-galactopyranoside. (d) Apigenin 6-C-β-D-glucopyranosyl-8-C-β-D-xylopyranoside. (e) Apigenin 6-C-β-D-galactopyranosyl-8-C-β-D-xylopyranoside. (f) Total flavone di-c-glycosides.

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