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Natural Product Research
Formerly Natural Product Letters
Volume 32, 2018 - Issue 19
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Research Articles

A new12-membered lactone from the stems of Ficus auriculata

Tai-Ming ShaoKey Labortory of Tropical Medicinal Plant Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, P. R. China;Key Laboratory of Medicinal and Edible Plants Resources of Hainan Province, School of Chemical and Material Engineering, Hainan Institute of Science and Technology, Haikou, P. R. China
,
Cai-Juan ZhengKey Labortory of Tropical Medicinal Plant Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, P. R. China
,
Xiao-Bao LiKey Labortory of Tropical Medicinal Plant Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, P. R. China
,
Guang-Ying ChenKey Labortory of Tropical Medicinal Plant Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, P. R. China
,
Xiao-Ping SongKey Labortory of Tropical Medicinal Plant Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, P. R. ChinaCorrespondence[email protected]
&
Chang-Ri HanKey Labortory of Tropical Medicinal Plant Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, P. R. China;Key Laboratory of Medicinal and Edible Plants Resources of Hainan Province, School of Chemical and Material Engineering, Hainan Institute of Science and Technology, Haikou, P. R. ChinaCorrespondence[email protected]
Pages 2268-2273 | Received 11 Sep 2017, Accepted 06 Nov 2017, Published online: 06 Dec 2017
 
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Abstract

A new lactone ficusine D (1), together with six known compounds (2–7) were isolated from the stems of the Ficus auriculata. The new compound 1 was a rare 12-membered lactone containing a quinone ring skeleton. The structure of the 1 was elucidated by comprehensive spectroscopic data. The relative and absolute configurations of 1 were elucidated by the ROESY analysis and biogenesis pathway. All compounds were evaluated for their antibacterial activities against six pathogenic bacteria in vitro. Compounds 6 and 7 exhibited potent antibacterial activities against Bacillus cereus with the MIC values of 2.5 and 5 μM, respectively.

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