. 2014 Nov 28;19(12):19935–19979. doi: 10.3390/molecules191219935
© 2014 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 license (http://creativecommons.org/licenses/by/4.0/).
Scheme 33.
The 5-azaindole rebeccamycin series.