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. 2022 Aug 19;27(16):5305. doi: 10.3390/molecules27165305

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© 2022 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 (https://creativecommons.org/licenses/by/4.0/).

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Scheme 3 — Preparation of the azide and boronate ester substituted hydroxylamine (6 and 8) [22,25].