Phytochemical constituents of the pericarps of and their anti-inflammatory activity.

Phytochemical investigation on the pericarps of lead to the isolation and structure elucidation of a new sesquiterpene, sesquicaranoic acid C (), a new neolignan, difengpiol C (), and 10 known compounds. The structures and absolute configurations of two new compounds were determined by a combination of NMR and CD spectroscopic analyses. All isolates were evaluated for their inhibitory effects on lipopolysaccharide (LPS)-induced nitric oxide (NO) production in RAW264.