Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
In vitro DPPH radical scavenging activities of prenylated xanthones isolated from the bark of G. xanthochymus.
| Compound | DPPH radical-scavenging activity (IC50. μM ) |
|---|---|
| 1 | 19.64 ± 0.39 |
| 2 | 31.82 ± 0.08 |
| 3 | 22.07 ± 0.25 |
| 4 | 40.70 ± 0.10 |
| 5 | 34.27 ± 0.25 |
| 6 | 66.88 ± 0.19 |
| ascorbic acid | 13.16 ± 0.03 |
| gallic acid | 5.86 ± 0.03 |
