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Two new hydroxylated ent-kauranoic acids, pterisolic acid G (1) and pterisolic acid H (3), together with five known ent-kaurane-type diterpenoids (2 and 4–7) were isolated from the whole plant of Pteris semipinnata L. The structures of compounds 1–3 were elucidated on the basis of HR-MS, 1D and 2D NMR analysis, and the absolute configuration of compounds 1 and 2 were determined by the results of single...
Two new ursane-type triterpene saponins, 3-O-β-d-glucopyranosyl(1→3)-[α-l-rhamnopyranosyl(1→2)]-α-l-arabinopyranosylurs-12,19(29)-dien-28-oic acid 28-O-α-l-rhamnopyranosyl(1→2)-β-d-glucopyranosyl ester (1) and 3-O-β-d-glucopyranosyl(1→3)-[α-l-rhamnopyranosyl(1→2)]-α-l-arabinopyranosyl-19α,20α-dihydroxyurs-12-en-28-oic acid 28-O-α-l-rhamnopyranosyl(1→2)-β-d-glucopyranosyl ester (2), along with thirteen...
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