Table 1.
The flavonoids from P. clypearia in this study and their inhibitions on NAs of influenza A and B viruses.
| No. | Names | IC50 (µg/mL) | ||
|---|---|---|---|---|
| A/PR/8/34(H1N1) | A/Sydney/5/97(H3N2) | B/Jiangsu/10/2003 | ||
| 1 | 7-O-galloylplumbocatechin A | 29.77 ± 6.12 | 32.23 ± 1.65 | 39.15 ± 4.67 |
| 2 | (−)-5,3′,4′,5′-tetrahydroxyflavan-7-gallate | 36.91 ± 3.80 | >40 | >40 |
| 3 | (+)-3,5,3′,4′,5′-pentahydroxyflavan-7-gallate | >40 | >40 | >40 |
| 4 | (−)-7,4′-di-O-galloyltricetiflavan | >40 | >40 | >40 |
| positive control | zanamivir | 3.00 × 10−5 ± 2.03 × 10−6 | 2.10 × 10−4 ± 1.84 × 10−5 | 3.00 × 10−4 ± 2.09 × 10−5 |