. 2019 May 1;24(9):1702. doi: 10.3390/molecules24091702
© 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/).
Scheme 15.
Synthesis of Tbt-β2,2 h bis-Arg-NHBn 21.