Abstract
L. is a popular chewing stick commonly known as "miswak". During our ongoing research activities on the chemical constituents of
roots, which is a new sulphur-containing imidazoline alkaloid 1,3-Dibenzyl-4-(1,2,3,4-tetrahydroxy-butyl)-1,3-dihydro-imidazole-2-thione, persicaline, (
) along with five known compounds (
-
) are identified. Compounds (
,
) were reported for the first time from the family
. The structure of the new compound was established by extensive spectroscopic data and HR-MS. The antioxidant activities of the fractions and isolates were evaluated using different in vitro methods, such as DPPH, superoxide anion and nitric oxide radicals scavenging assays. Compound (
) showed a promising antioxidant activity with IC
0.1, 0.08, and 0.09 µM in the three assays, respectively, comparable to ascorbic acid.