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. 2019 May 15;24(10):1875. doi: 10.3390/molecules24101875

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© 2019 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 (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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The crystalline structure of: (a) cis- $δ$ -hydroxy- $γ$ -lactone 13a; (b) trans- $δ$ -hydroxy- $γ$ -lactone 12b; and (c) trans- $δ$ -hydroxy- $γ$ -lactone 12c.