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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/).
1H-1H correlation spectroscopy (COSY) and Key heteronuclear multiple bond correlation (HMBC) correlations for 1 (A). Comparison of experimental and calculated electronic circular dichroism (ECD) spectra for 1 (B).