UHPLC-ESI-MS Analysis of Purified Flavonoids Fraction from Stem of Dendrobium denneaum Paxt. and Its Preliminary Study in Inducing Apoptosis of HepG2 Cells

Figure 2

Chemical structures and MS/MS spectra of 8 flavonoids, Apigenin-6,8-di-C-β-glucoside (a), Isoschaftoside (b), Schaftoside (c), Quercetin-3-O-rutinoside-7-O-glucoside (d), Rutin (e), Kaempferol-3-O-rutinoside (f), Apigenin-7-O-rutinoside (g), Apigenin-6-C-glucosyl-2′′-O-xyloside (h).

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)