Fig. 2.
The percentage of inhibition of the free DPPH radical in the presence of 5, 5a, and 6. The concentration of the different compounds is expressed as µM
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.