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標題: Tocopherols and triterpenoids from Sida acuta
作者: Chen, C.R.
Chao, L.H.
Pan, M.H.
Liao, Y.W.
Chang, C.I.
關鍵字: Sida acuta;malvaceae;tocopherol;triterpene;7(a)-methoxy-alpha-tocopherot;taraxast-1,20(30)-dien-3-one;constituents;malvaceae
Project: Journal of the Chinese Chemical Society
期刊/報告no:: Journal of the Chinese Chemical Society, Volume 54, Issue 1, Page(s) 41-45.
A new tocopherol derivative, 7(a)-methoxy-alpha-tocopherol (1), and a new taraxastane triterpene, taraxast-1,20(30)-dien-3-one (5), together with four known compounds, beta-tocopherol (2), alpha-tocopherol (3), alpha-tocospiro B (4) and taraxasterone (6) were isolated from the whole plant of Sida acuta. Their structures were elucidated by spectral analysis including MS, 1D and 2D-NMR spectroscopy. Among those compounds, compounds 1, 2, and 3 showed significant antioxidant effect (EC50 = 86.9, 68.2, and 70.9 mu M, respectively) in the DPPH radicals scavenging activity assay.
ISSN: 0009-4536
Appears in Collections:期刊論文

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