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. 2017 Jul 18;7:5738. doi: 10.1038/s41598-017-05936-3

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Synthesis scheme and molecular structures for Ru-chrysin and Ru-thio-chrysin. (A) Schematic diagram represents the synthesis of Ru-chrysin and Ru-thio-chrysin from chrysin and thio-chrysin, respectively via reaction with bis [dichlorido (η⁶-p-cymene)] ruthenium(II). The molecular structures of Ru-chrysin (B) and Ru-thio-chrysin (C) were determined by X-ray diffraction studies. The hydrogen bonds are not shown in the figures to enhance the clarity of the molecular images. The symbols C, O, Cl, S and Ru represent carbon, oxygen, chlorine, sulfur and ruthenium, respectively. The numbers shown indicate the position of respective carbon atoms.