Table 2 Assigned scores for the eight high content flavonoids in flavonoids-rich extract from S. baicalensis shoots
Flavonoids | Number of structural features | Total score of structural features | ||||
|---|---|---|---|---|---|---|
Double bond (10 scores) | C7-OH (4 scores) | C4′-OH (4 scores) | C6-OH (3 scores) | Sugar moiety (− 1 score) | ||
Apigenin (1)a | 7 | 1 | 1 | 0 | 0 | 78 |
Baicalein (2) | 7 | 1 | 0 | 1 | 0 | 77 |
Scutellarin (3) | 7 | 0 | 1 | 1 | 1 | 76 |
Chrysin (4) | 7 | 1 | 0 | 0 | 0 | 74 |
Apigenin-7-O-G (5) | 7 | 0 | 1 | 0 | 1 | 73 |
Baicalin (6) | 7 | 0 | 0 | 1 | 1 | 72 |
Chrysin-7-O-G (7) | 7 | 0 | 0 | 0 | 1 | 69 |
Isocarthamidin-7-O-G (8) | 6 | 0 | 1 | 1 | 1 | 66 |