. 2021 Apr 14;8(4):210110. doi: 10.1098/rsos.210110
© 2021 The Authors.
Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
Figure 1.
The structural formulae for OLS, SUL and AC.