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. 2021 Feb 18;26(4):1081. doi: 10.3390/molecules26041081

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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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Scheme 7 — Synthetic routes to BA/BE-derived dimers and hybrids 21–25. Reagents and conditions: (i) DCC, DMAP, CH₂Cl₂, 0 °C→rt; (ii) DMAP, CH₂Cl₂, 0 °C→rt.