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. 2012 Apr 20;17(4):4684–4702. doi: 10.3390/molecules17044684

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© 2012 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Structures in 2D (two dimensions) of 2 melampolides teraludin I (a1) and tetrahelin C (b1), and respective 3D (three dimensions) structures (a2 and b2).