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. 2014 Jan 17;12(1):317–351. doi: 10.3390/md12010317

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© 2014 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 10 — The synthesis of the polyheterocyclic core of micrococcin P1 by Ciufolini. Reagents and conditions: (a) cat. Li₂CO₃, EtOAc, 92%; (b) NH₄OAc, EtOH then DDQ, toluene, 97%.