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.
(a) Tyrosinase activity of 19 pure xanthones. * significant differences (p ≤ 0.05, Dunnett’s test) compared to the negative control (B); kojic acid was used as positive control (C). (b) Dose-response tyrosinase activity of selected compounds 7 and 8.
