CS extract contained a significant amount of phenol and flavonoids. The percentage of
DPPH radical scavenged by CS extract was 92.6 at a concentration of 1.6 mg ml–1. IC50 of the extract and the standard compounds
butylated hydroxytoluene (BHA) and quercetin was 0.59, 0.053, and 0.025 mg ml–1, respectively. Iron chelating activity of the
extract was less than the standard compounds