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DOI: 10.1055/s-0032-1321017
Triterpene acids from euscaphis and assessment of their cytotoxic and anti-no activities
Six new triterpenoids, euscaphic acids G-L (1-6), along with nine known triterpene acids, and two known lignans were isolated from the ethanolic extract of the twigs of Euscaphis japonica. This is the first report concerning 1α,3β-dihydroxy-12-oleanen-28-oic acid isolated from a natural source. The structures of the new compounds were established by spectroscopic analysis. The cytotoxic and anti-NO production activities for the isolates are also evaluated and discussed, compound 1, hederagenin (11), and arjunic acid (12) showed significant cytotoxicity against NCI-H460 cells, HT-29 cells, and CEM cells (IC50 =1.64±0.8, 2.11±1.5, 1.73±0.6µM, respectively). Some of isolated triterpenoids showed marginal inhibitions on NO production induced by LPS.