Eight new diterpenes, 6α,7β-dihydroxyferruginol (1), 6α,7α-dihydroxyferruginol (2), 6α-hydroxyhinokiol (3), 4α-hydroxy-7-oxo-18-norabieta-8,11,13-trien-4α-ol (4a), 15,16-dehydrosugiol (5), 7-methoxy-6,7-secoabieta-8,11,13-triene-6,12-diol (6), 7α-acetoxyabieta-8,12-diene-11,14-dione (7), 7α-butyloxyethyloxyabieta-8,12-diene-11,14-dione (8), along with four known compounds, 6,7-dehydroferruginol (9), 12-hydroxy-6,7-secoabieta-8,11,13-triene-6,7-dial (10), 7α-11-dihydroxy-12-methoxy-8,11,13-abietatriene (11), and 11,14-dihydroxy-8,11,13-abietatrien-7-one (12) were successfully isolated from the bark of Calocedrus macrolepis var. formosana. The structures of all isolates were elucidated by physical data (appearance, UV, IR, optical rotation) and spectroscopic data (1D, 2D NMR, and HREIMS). Compounds 9, 10, 11, and 12 showed promising growth-inhibitory effect on human lymphatic endothelial cells (LECs). Among these compounds, compound 10 exerted the most potent anti-lymphangiogenesis property by suppressing cell growth and tube formation of LECs. In conclusion, the results revealed the anti-lymphangiogenic potentials of Formosan C. macrolepis var. formosana.
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| http://dx.doi.org/10.38212/2224-6614.3375 | DOI Listing |
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