Coumamarin: a first coumarinyl calcium complex isolated from nature.

Hamed A, Abdel-Razek AS, Frese M, Sproß J, Stammler H-G, Sewald N, Shaaban M (2019)
The Journal of antibiotics.

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Zeitschriftenaufsatz | E-Veröff. vor dem Druck | Englisch
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The first calcium complex from nature, Coumamarin (1), 7-hydroxy-3-methoxy-2-oxo-2H-chromene-6-carboxylate Ca(II) complex, was isolated from Aspergillus sydowii ASTI, together with diorcinol (2), violaceol I (3), hydroxysydonic acid (4), cyclo (Trp-Phe), kojic acid, ergosterol, and uracil. The producing strain was isolated from marine water sample collected from Tiran Island, Red Sea, Egypt. Structure 1 was assigned by intensive 1D, 2D NMR, HR-ESIMS, and X-ray crystallography as well. Coumamarin is potentially active against certain tested bacteria and yeasts, while showing no cytotoxic activity against human cervix carcinoma cell line (KB-3-1). Taxonomically, the fungus was identified by phylogenetic analysis of its 18S rRNA gene sequence.
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The Journal of antibiotics
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Hamed A, Abdel-Razek AS, Frese M, et al. Coumamarin: a first coumarinyl calcium complex isolated from nature. The Journal of antibiotics. 2019.
Hamed, A., Abdel-Razek, A. S., Frese, M., Sproß, J., Stammler, H. - G., Sewald, N., & Shaaban, M. (2019). Coumamarin: a first coumarinyl calcium complex isolated from nature. The Journal of antibiotics. doi:10.1038/s41429-019-0207-7
Hamed, A., Abdel-Razek, A. S., Frese, M., Sproß, J., Stammler, H. - G., Sewald, N., and Shaaban, M. (2019). Coumamarin: a first coumarinyl calcium complex isolated from nature. The Journal of antibiotics.
Hamed, A., et al., 2019. Coumamarin: a first coumarinyl calcium complex isolated from nature. The Journal of antibiotics.
A. Hamed, et al., “Coumamarin: a first coumarinyl calcium complex isolated from nature.”, The Journal of antibiotics, 2019.
Hamed, A., Abdel-Razek, A.S., Frese, M., Sproß, J., Stammler, H.-G., Sewald, N., Shaaban, M.: Coumamarin: a first coumarinyl calcium complex isolated from nature. The Journal of antibiotics. (2019).
Hamed, Abdelaaty, Abdel-Razek, Ahmed S, Frese, Marcel, Sproß, Jens, Stammler, Hans-Georg, Sewald, Norbert, and Shaaban, Mohamed. “Coumamarin: a first coumarinyl calcium complex isolated from nature.”. The Journal of antibiotics (2019).

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