Extracts of Coreopsis tinctoria Nutt. Flower Exhibit Antidiabetic Effects via the Inhibition of α-Glucosidase Activity

Figure 1

LC-MS chromatographic profile of CTF extracts. (a) Ms spectra at 280 nm () and absorbance spectra () of the WEC. (b) Ms spectra at 280 nm () and absorbance spectra () of the EEC. 1: 3′,5,5′,7-Tetrahydroxyflavanone-O-hexoside; 2: Quercetagitin-7-O-glucoside; 3: Okanin; 4: 3,4′,5,6,7-Pentahydroxyflavanone; 5: Luteolin-7-O-glucoside; 6: Chlorogenic Acid; 7: Luteolin; 8: Coreopsin; 9: Dicaffeoylquinic acid; 10: 3′,5,5′,7-Tetrahydroxyflavanone; 11: Coreopsin.

(a)

(b)