Constituents of the Leaves of Pandanus utilis.

Nineteen compounds, including seven triterpenoids (1-7), five steroids (8-12), four cyclohexenone derivatives (13-16), two benzenoid glycosides (17 and 18) and one lignan (19), were isolated and separated from the leaves of Pandanus utilis through bioactivity-guided fractionation. Among them, one new lanosterol- type triterpenoid was found and named as (24R)-24-methyl-5a-4-demethyllanosta-9(11),25-dien-3ß-ol (1). The structures of the isolates were determined by mass and spectroscopic analyses, and the compounds were subjected to anti-inflammatory, anti-oxidative and cytotoxic assays.