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. 2015 Oct 29;20(11):19660–19673. doi: 10.3390/molecules201119649

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© 2015 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).

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Scheme 1 — Preparation of epoxycarvone stereoisomers. Reagents and Conditions: a. H₂O₂ 30%, KOH, MeOH, 4 h, 0 °C; b. NaBH₄, CeCl₃^.7 H₂O, MeOH, 5 min., 20 °C; c. m-CPBA in CH₂Cl₂, 6 h, 0 °C; d. PCC, Pyr, 30 h, r.t.