Two new antioxidative compds. were isolated from methanolic ext. of root of the Rhinacanthus nasutus. These chem.
structures were elucidated by anal. of 1D and 2D NMR spectra including MS. Antioxidant activities of these isolates were
detd. by DPPH radical scavenging activity test. As the results, antioxidant activities of these isolates were comparative to
Trolox used as a pos. control. These isolates showed little or no detectable cytotoxicity against both human cancerous
and normal cells.