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. 2012 Aug 27;17(9):10192–10231. doi: 10.3390/molecules170910192

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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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Scheme 12 — Cyclization of diacylhydrazine with thionyl chloride. 50 [28], 51 [29] and 52 [30].