Mar. Drugs 2011, 9(8), 1403-1418; doi:10.3390/md9081403
Article

Bioactive (3Z,5E)-11,20-Epoxybriara-3,5-dien-7,18-olide Diterpenoids from the South China Sea Gorgonian Dichotella gemmacea

1email, 1email, 1email, 2email, 2email, 1email, 1email, 1email, 1,* email and 1,* email
Received: 1 July 2011; in revised form: 28 July 2011 / Accepted: 8 August 2011 / Published: 16 August 2011
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Six new (3Z,5E)-11,20-epoxybriara-3,5-dien-7,18-olide diterpenoids, gemmacolides N–S (16), were isolated together with four known analogues, juncenolide D, and juncins R, S and U (710), from the South China Sea gorgonian Dichotella gemmacea. The structures of the new compounds were elucidated by the detailed analysis of spectroscopic data in combination with the comparison with reported data. The absolute configuration of 1 was determined by a TDDFT calculation of its solution ECD spectrum, affording the determination of absolute configuration of other analogues by simply comparing their ECD spectra with that of 1. The cytotoxic and antimicrobial activities of these compounds were evaluated. In preliminary in vitro bioassays, compounds 4, 5, 6, 8 and 9 showed cytotoxicity against A549 and MG63, while compounds 1, 2, 4, 710 showed antimicrobial activity against the fungus Septoria tritici and the bacterium Escherichia coli.
Keywords: briarane diterpenoids; biological activity; structure elucidation; gorgonian; Dichotella gemmacea
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MDPI and ACS Style

Li, C.; La, M.-P.; Sun, P.; Kurtan, T.; Mandi, A.; Tang, H.; Liu, B.-S.; Yi, Y.-H.; Li, L.; Zhang, W. Bioactive (3Z,5E)-11,20-Epoxybriara-3,5-dien-7,18-olide Diterpenoids from the South China Sea Gorgonian Dichotella gemmacea. Mar. Drugs 2011, 9, 1403-1418.

AMA Style

Li C, La M-P, Sun P, Kurtan T, Mandi A, Tang H, Liu B-S, Yi Y-H, Li L, Zhang W. Bioactive (3Z,5E)-11,20-Epoxybriara-3,5-dien-7,18-olide Diterpenoids from the South China Sea Gorgonian Dichotella gemmacea. Marine Drugs. 2011; 9(8):1403-1418.

Chicago/Turabian Style

Li, Cui; La, Ming-Ping; Sun, Peng; Kurtan, Tibor; Mandi, Attila; Tang, Hua; Liu, Bao-Shu; Yi, Yang-Hua; Li, Ling; Zhang, Wen. 2011. "Bioactive (3Z,5E)-11,20-Epoxybriara-3,5-dien-7,18-olide Diterpenoids from the South China Sea Gorgonian Dichotella gemmacea." Mar. Drugs 9, no. 8: 1403-1418.

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