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Keywords = 5α,8α-epidioxy-22β,23β-epoxyergosta-6-en-3β-ol

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8 pages, 424 KiB  
Article
Two New Epoxysteroids from Helianthus tuberosus
by Xiao-Dong Li, Feng-Ping Miao and Nai-Yun Ji
Molecules 2011, 16(10), 8646-8653; https://doi.org/10.3390/molecules16108646 - 13 Oct 2011
Cited by 9 | Viewed by 6402
Abstract
Two new epoxy steroids, 5α,8α-epidioxy-22β,23β-epoxyergosta-6-en-3β-ol (1) and 5α,8α-epidioxy-22α,23α-epoxyergosta-6-en-3β-ol (2), and ten known steroids including (24R)-5α,8 [...] Read more.
Two new epoxy steroids, 5α,8α-epidioxy-22β,23β-epoxyergosta-6-en-3β-ol (1) and 5α,8α-epidioxy-22α,23α-epoxyergosta-6-en-3β-ol (2), and ten known steroids including (24R)-5α,8α-epidioxyergosta-6-en-3β-ol (3), (22E,24R)-5α,8α-epidioxyergosta-6,22-dien-3β-ol (4), (22E,24R)-5α,8α-epidioxyergosta-6,9(11),22-trien-3β-ol (5), β-sitosterol (6), sitost-5-en-3β-ol acetate (7), 7α-hydroxysitosterol (8), schleicheol 2 (9), (24R)-24-ethyl-5α-cholestane-3β,5α,6β-triol (10), 7α-hydroxystigmasterol (11), and stigmasterol (12) were isolated from Helianthus tuberosus grown in Laizhou salinized land of coastal zone of Bohai Sea, China. The structures of these compounds were unambiguously established by 1D, 2D NMR and mass spectroscopic techniques. The new compounds 1 and 2 exhibited weak antibacterial activity and no antifungal activity. Full article
(This article belongs to the Special Issue Steroids)
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