A methanol extract of the dried bark of Liriosma ovata afforded two new isoprenoid glycosides, a eudesmane sesquiterpene, 1alpha(beta- d-glucopyranosyloxy)eudesma-3alpha,4beta, 11-triol ( 1), and a C 13-norisoprenoid, 3alpha,6alpha-dihydroxymegastigman-7-en-9-one 3- O-beta-
The phytochemical study of Pittocaulon filare afforded three oplopanes (1-3), a eudesmane (6), and three oplopane glucosides (7-9), one of them reported as its acetyl derivative (7a), together with several known compounds. The structures of the compounds were elucidated by spectroscopic analysis and
Seven new sesquiterpenes (1, 3-8), a new sesquiterpene natural product (2), and two new lignans (9 and 10), together with 15 known compounds, were isolated from the fruits of Xanthium sibiricum. The structures of the new compounds were established by NMR spectroscopic analysis, ECD calculations, and
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