Abstract
Five new pyrazin-2(1H)-one derivatives, ochramides A–D (1–4) and ochralate A (5), as well as three known analogues (6–8) were isolated from the fermentation broth of the marine coral-derived halotolerant Aspergillus ochraceus LCJ11-102 in a nutrient-limited medium containing 10% NaI. Their chemical structures were determined by analyzing NMR and X-ray diffraction data. Compounds 2, 5 and 6 showed antimicrobial activities against Enterobacter aerogenes with the MIC values of 40.0, 18.9, and 20.1 μM, respectively.
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Acknowledgements
This work was supported by Grants from National Natural Science Foundation of China (Nos. 41376148, 81373298, U1501221, 81561148012 and U1406402-1), and from Special Fund for Marine Scientific Research in the Public Interest of China (No. 201405038). The working strain LCJ11-102 was identified by Prof. C. X. Fang, China Center for Type Culture Collection. The X-ray single crystal diffraction data analysis was performed by Prof. Dr. Zhiyong Wu.
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Xiaoping Peng and Yi Wang have contributed equally to this work.
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Peng, X., Wang, Y., Zhu, T. et al. Pyrazinone derivatives from the coral-derived Aspergillus ochraceus LCJ11-102 under high iodide salt. Arch. Pharm. Res. 41, 184–191 (2018). https://doi.org/10.1007/s12272-017-0928-8
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DOI: https://doi.org/10.1007/s12272-017-0928-8