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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/).
Structure-activity relationship of Dol-10 (1). The red marked part was an essential group for antitumor activity, and some modifications (marked with blue) had stronger activity than 1, while other modifications (marked with green) possessed activity equivalent to 1.