. 2019 Jan 19;24(2):355. doi: 10.3390/molecules24020355
© 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 29.
Synthesis of methyl 2-hydroxybetulinate 127.