A Meroterpenoid Isolated From the Fungus Aspergillus sp.

A meroterpenoid, chevalone B, was obtained from the Cucumaria japonica-derived fungus Aspergillus sp. H30, which was collected from the South China Sea. The structure was determined by the analysis of nuclear magnetic resonance (NMR) spectroscopic and X-ray data. This is the first report of the crystallographic data and absolute stereochemistry of chevalone B, which was shown to have weak antibacterial activity.

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A Novel Compound Enniatin G from the Mangrove Fungus Halosarpheia sp. (strain #732) from the South China Sea

Australian Journal of Chemistry ◽

10.1071/ch01164 ◽

2002 ◽

Vol 55 (3) ◽

pp. 225 ◽

Cited By ~ 51

Author(s):

Y. Lin ◽

J. Wang ◽

X. Wu ◽

S. Zhou ◽

L. L. P. Vrijmoed ◽

...

Keyword(s):

Nuclear Magnetic Resonance ◽

Magnetic Resonance ◽

South China Sea ◽

South China ◽

Spectroscopic Data ◽

The South China Sea ◽

Two Dimensional ◽

The South ◽

China Sea ◽

Cyclic Depsipeptide

A novel cyclic depsipeptide, enniatin G, together with enniatins B and B4 were isolated from the mangrove fungus Halosarpheia sp.(strain 732) from the South China Sea. Their structures were determined by analysis of spectroscopic data, mainly two-dimensional nuclear magnetic resonance experiments. Enniatin G exhibited activity against Heps 7402, ED50 12mg/mL.

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Chevalones H–M: Six New α-Pyrone Meroterpenoids from the Gorgonian Coral-Derived Fungus Aspergillus hiratsukae SCSIO 7S2001

Marine Drugs ◽

10.3390/md20010071 ◽

2022 ◽

Vol 20 (1) ◽

pp. 71

Author(s):

Xia-Yu Chen ◽

Qi Zeng ◽

Yu-Chan Chen ◽

Wei-Mao Zhong ◽

Yao Xiang ◽

...

Keyword(s):

Antibacterial Activity ◽

South China Sea ◽

South China ◽

A549 Cell ◽

Spectroscopic Analysis ◽

X Ray Diffraction ◽

Gorgonian Coral ◽

X Ray ◽

Ic50 Values ◽

Mcf 7

Six new α-pyrone meroterpenoid chevalones H–M (1–6), together with six known compounds (7–12), were isolated from the gorgonian coral-derived fungus Aspergillus hiratsukae SCSIO 7S2001 collected from Mischief Reef in the South China Sea. Their structures, including absolute configurations, were elucidated on the basis of spectroscopic analysis and X-ray diffraction data. Compounds 1–5 and 7 showed different degrees of antibacterial activity with MIC values of 6.25–100 μg/mL. Compound 8 exhibited potent cytotoxicity against SF-268, MCF-7, and A549 cell lines with IC50 values of 12.75, 9.29, and 20.11 μM, respectively.

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Amphilectene Diterpene Isonitriles and Formamido Derivatives from the Hainan Nudibranch Phyllidia Coelestis

Marine Drugs ◽

10.3390/md17110603 ◽

2019 ◽

Vol 17 (11) ◽

pp. 603 ◽

Cited By ~ 2

Author(s):

Marianna Carbone ◽

Maria Letizia Ciavatta ◽

Emiliano Manzo ◽

Xiao-Lu Li ◽

Ernesto Mollo ◽

...

Keyword(s):

Nuclear Magnetic Resonance ◽

Magnetic Resonance ◽

South China Sea ◽

Chemical Defense ◽

South China ◽

Generalist Predator ◽

Nmr Analysis ◽

Terpene Content ◽

Structural Architecture ◽

Dietary Origin

Terpene content of two distinct collections of the nudibranch Phyllidia coelestis from the South China Sea has been chemically analyzed. A series of amphilectene diterpenes, most likely of dietary origin, with isocyano and formamido functionalities have been isolated from both collections and spectroscopically characterized by an exhaustive nuclear magnetic resonance (NMR) analysis. Interestingly, the structural architecture of compounds 5–7 and 9 with both 8,13-cis and 12,13-cis ring junctions is unprecedented in the amphilectene skeleton. Metabolite 3, which was the most abundant in the nudibranch’s mantle, has been shown to deter feeding by a generalist predator, supporting its involvement in chemical defense.

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Clay Mineralogy and Geochemistry of the Pockmarked Surface Sediments from the Southwestern Xisha Uplift, South China Sea: Implications for Weathering and Provenance

Geosciences ◽

10.3390/geosciences11010008 ◽

2020 ◽

Vol 11 (1) ◽

pp. 8

Author(s):

Mei Zhang ◽

Hongfeng Lu ◽

Qing Chen ◽

Gayan Bandara ◽

Hui Zhang ◽

...

Keyword(s):

South China Sea ◽

Clay Minerals ◽

South China ◽

Surface Sediments ◽

Northern South China Sea ◽

Clay Mineralogy ◽

Xrd Analysis ◽

Average Weight ◽

X Ray ◽

China Sea

In the northern South China Sea, pockmarks are widely distributed on the seabed offshore on the southwestern Xisha Uplift. The mineralogy and geochemistry of the clay minerals and surface sediments from the pockmark field were identified using X-ray diffraction (XRD) analysis and X-ray fluorescence (XRF) analysis to trace the provenance, weathering, and sediment transportation system in the area. The clay minerals are primarily comprised of illite, smectite, kaolinite, and chlorite, showing a distribution of average weight percentages of 35%, 35%, 18%, and 13%, respectively. Based on the surrounding fluvial drainage basins and various transport mechanisms (current or monsoon), illite and chlorite primarily originate from rivers in Taiwan and the Mekong and Red Rivers. Kaolinite primarily originates from the Pearl River, and smectite derived from the Luzon arc system is primarily transported by surface currents with significant influence from the Kuroshio intrusion.

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