“…Besides the well-known flavonoid C -glycosides vitexin, isovitexin, orientin, isoorientin, schaftoside, isoshaftoside, neoshaftoside, and their O -glycosylated and or O -acylated derivatives, more and more flavonoid C -glycosides were disclosed. These 6- or 8- C - β -D-glucopyranosides can be divided into five groups: (1) mono- C -glycosylated flavonoids 1 – 3 [ 12 , 37 ], 39 – 42 [ 12 , 13 , 37 ]; (2) 6, 8-di- C -glycosylated flavonoids 4 [ 38 ], 43 [ 39 ]; (3) flavonoid 6- or 8- C - β -D-glucopyranoside-7- O - β -D-glucopyranosides 5 – 10 [ 40 , 41 , 42 , 43 ], 44 [ 44 ]; (4) 2″- or 6″- O -glycosylated flavonoid 6- or 8- C - β -D-glucopyranosides 11 – 31 [ 9 , 38 , 45 , 46 , 47 , 48 , 49 , 50 ], 45 – 55 [ 14 , 51 , 52 , 53 , 54 , 55 , 56 , 57 ]; (5) 2″- or 6″- O -acylated flavonoid 6- or 8- C - β -D-glucopyranosides 32 – 38 [ 10 , 11 , 55 , 56 ], 56 – 80 [ 57 , 58 , 59 , 60 ,…”