Triterpenoids from the Mangrove Plant Hibiscus tiliaceus |
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| Authors: | Chao Feng Xiao‐Ming Li Nai‐Yun Ji Bin‐Gui Wang |
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| Institution: | 1. Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, P.?R. China;2. Graduate School of the Chinese Academy of Sciences, Beijing 100049, P.?R. China;3. (phone: +86‐532‐82898579, fax: +86‐532‐82898568);4. (phone: +86‐532‐82898553, fax: +86‐532‐82880645) |
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| Abstract: | Three new triterpenoids with the rarely occurring nigrum skeleton, namely (20E)‐22‐hydroxynigrum‐20‐en‐3‐one ( 1 ), 21β‐hydroxynigrum‐22(29)‐en‐3‐one ( 2 ), and 21α‐hydroxynigrum‐22(29)‐en‐3‐one ( 3 ), were isolated from the mangrove plant Hibiscus tiliaceus. Additionally, five known triterpenoids including friedelin ( 4 ), 12‐oleanen‐3β‐ol ( 5 ), 3β‐hydroxy‐12‐oleanen‐28‐oic acid ( 6 ), 20(29)‐lupen‐3β,28‐diol ( 7 ), and cucurbita‐5,23‐dien‐3β,25‐diol ( 8 ) were also isolated and identified. The latter structures were elucidated by a detailed NMR and MS analyses, as well as by comparison with reported literature data. |
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| Keywords: | Hibiscus tiliaceus Triterpenoids Nigrum triterpenoids Mangrove plants |
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