Table 1.
Affinities of candidate active components targeting ACE2 protein obtained by SPR analysis.
| Compd. | KD (μmol/L) | Rmax (RU) | χ2 |
|---|---|---|---|
| Neochlorogenic acid (19) | 7.880 | 6.894 | 1.260 |
| Amygdalin (33) | 0.221 | 6.856 | 0.462 |
| Prunasin (37) | 0.268 | 3.814 | 0.244 |
| Forsythoside I (104) | 18.700 | 19.020 | 1.910 |
| Rutin (124) | 82.400 | 12.770 | 1.290 |
| Forsythoside B (125) | 61.000 | 10.620 | 0.328 |
| Forsythoside A (128) | 15.800 | 21.490 | 5.280 |
| Quercetin (190) | 21.100 | 12.780 | 1.580 |
| Emodin 8-O-β-d-glucoside (195) | 21.270 | 16.930 | 3.190 |
| Aloe-emodin (216) | 6.020 | 16.120 | 7.720 |
| Glycyrrhizin (222) | 4.390 | 9.614 | 0.321 |
| Rhein (226) | 33.300 | 13.200 | 0.669 |
| Physcion (230) | 0.379 | 18.390 | 1.630 |