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Three new compounds (3, 7, and 11) together with eight known phytoecdysteroids (1, 2, 4–6, and 8–10) were isolated from the rhizomes of common polypody, Polypodium vulgare L. The structures of compounds were elucidated by spectroscopic methods including 1D and 2D NMR measurements. The 1 H and 13 C NMR assignments of compounds 1, 6, 9 and 10 are included.
Three new natural ecdysteroids viz. 22‐dehydro‐20‐deoxy‐ajugasterone C (1), 1‐hydroxy‐22‐deoxy‐20,21‐didehydro‐ecdysone (2) and 22‐deoxy‐20,21‐didehydro‐ecdysone (3) were isolated from the methanol extract of the roots of Serratula wolffii. The structures of compounds 1–3 were established by various spectroscopic techniques, including one‐ and two‐dimensional NMR, circular dichroism and mass spectroscopic...
Two new ecdysteroids, named serfurosterone A and serfurosterone B, were isolated from a methanol extract of the roots of Serratula wolffii. Spectroscopic methods revealed that these compounds had previously unknown ecdysteroid structures with acetal functions in the side-chains.
Investigation of the methanol extract of the roots of Serratula wolffii resulted in an ecdysone-related compound, 2β,3β,20R,22R,25-pentahydroxy-5β-cholest-6,8(14)-dien (1), a new ecdysteroid, 24-methylene-shidasterone (2), the known compound stachysterone B (3) and its 14,15-α-epoxide (4), a novel natural product. The structures of compounds 1–4 were established by spectral analysis ( 1 H...
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