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. 2021 Jan 12;26(2):366. doi: 10.3390/molecules26020366

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© 2021 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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Chemical structure of 11-keto-α-boswellic acid (α-KBA). (a) Structure and numbering scheme. (b) Illustration of important ROESY (rotating frame Overhauser enhancement spectroscopy) correlations.