Table 1.
Tyrosinase inhibition activities of compounds from the twigs of M. alba (n = 3).
| Compounds | IC50 (µM) ± SD |
|---|---|
| Morusone (1) | 290.00 ± 7.90 |
| Steppogenin (2) | 0.98 ± 0.01 |
| 2,4,2′,4′-Tetrahydroxychalcone (3) | 0.07 ± 0.02 |
| Morachalcone A (4) | 0.08 ± 0.02 |
| Oxyresveratrol (5) | 0.10 ± 0.01 |
| Morusin (6) | >100 |
| Kuwanon C (7) | 52.00 ± 2.50 |
| Cyclomulberrin (8) | 66.30 ± 7.20 |
| 5,7,2′,4′-Tetrahydroxy-3-methoxyflavone (9) | >150 |
| Dihydrokaempferol (10) | >200 |
| Eriodictyol (11) | >150 |
| 2,4-Dihydroxybenzoic acid (12) | >200 |
| p-Coumaric acid (13) | >200 |
| Moracin M (14) | 8.00 ± 0.22 |
| Moracin J (15) | 76.34 ± 0.86 |
| Moracin B (16) | 34.40 ± 1.7 |
| Moracin D (17) | >200 |
| Kojic acid | 58.30 ± 1.60 |