. 2017 Nov 13;20(1):547–563. doi: 10.1080/15685551.2017.1395502
© 2017 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 1.
1H NMR spectrum of the monomer 4a (300 MHz, 293 K, CDCl3).