Chemical profiling (HPLC-NMR & HPLC-MS), isolation, and identification of bioactive meroditerpenoids from the southern Australian marine brown alga Sargassum paradoxum.

Chemical profiling (HPLC-NMR & HPLC-MS), isolation, and identification of bioactive meroditerpenoids from the southern Australian marine brown alga Sargassum paradoxum.
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DOI:
10.3390/md13010102
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发表时间:
2014-12-29
期刊:
影响因子:
5.4
通讯作者:
Urban S
Urban S
中科院分区:
医学2区
文献类型:
--
作者:
Brkljača R;Urban S

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对澳大利亚南部海洋褐藻(马尾藻)的植物化学研究分离和鉴定了四种新的(5、9、10 和 15)和九种先前报道的(1、2、6-8 和 11-14)生物活性二萜类化合物。 HPLC-NMR 和 HPLC-MS 是鉴定一种新的不稳定化合物马尾藻氢奎纳尔 (9) 的核心,并且在八种(1、2、5-7 和 10-12)其他二萜类化合物的解卷积中至关重要。特别是,使用停流 HPLC-NMR 和 HPLC-MS 实现了粗二氯甲烷提取物中两种主要成分(1 和 2)的完整表征和鉴定。本研究首次在停流 HPLC-NMR 模式下采集了 gHMBCAD NMR 谱图,系统仅配备 60 μL HPLC-NMR 流通池,无需使用冷探针、微线圈或任何预浓缩。
A phytochemical investigation of a southern Australian marine brown alga, Sargassum paradoxum, resulted in the isolation and identification of four new (5, 9, 10, and 15) and nine previously reported (1, 2, 6–8, and 11–14) bioactive meroditerpenoids. HPLC-NMR and HPLC-MS were central to the identification of a new unstable compound, sargahydroquinal (9), and pivotal in the deconvolution of eight (1, 2, 5–7, and 10–12) other meroditerpenoids. In particular, the complete characterization and identification of the two main constituents (1 and 2) in the crude dichloromethane extract was achieved using stop-flow HPLC-NMR and HPLC-MS. This study resulted in the first acquisition of gHMBCAD NMR spectra in the stop-flow HPLC-NMR mode for a system solely equipped with a 60 μL HPLC-NMR flow cell without the use of a cold probe, microcoil, or any pre-concentration.
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