. 2021 Aug 31;26(17):5273. doi: 10.3390/molecules26175273
© 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 (https://creativecommons.org/licenses/by/4.0/).
Figure 2.
1H-1H COSY (
) and HMBC (
) correlations of 1–6.