New Triterpenoids and Anti-Inflammatory Constituents from Glinus oppositifolius.

Three new triterpenoids-spergulagenin B (1), spergulagenin C (2), and spergulagenin D (3)-were isolated from the aerial part of Glinus oppositifolius, along with 17 known compounds (4-20). The structures of these new compounds were identified by spectroscopic and MS analyses. Compounds 3, 5, 19, and 20 were evaluated for inhibition of nitric oxide production in LPS-stimulated RAW 264.7 cells with IC50 values of 17.03, 18.21, 16.30, and 12.64 µM, respectively. Compounds 3, 5, and 20 exhibited inhibitory effects on LPS-induced nitric oxide production in RAW 264.7 cells with IC50 values of 18.35 ± 1.34, 17.56 ± 1.41, and 14.27 ± 1.29 µM, respectively.