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(S)-Benzyl 2-cyclopropyl-2-hydroxyacetate is an intermediate reactant in the synthesis of Camptothecin (HY-16560). Camptothecin is an inhibitor of the DNA topoisomerase Topo I, withIC50=679 nM[1][2].

[1] Li Zhen, et al. Camptothecin derivative, and pharmaceutical composition and use thereof. World Intellectual Property Organization, WO2023020605 A1. 2023-02-23.
[2] Huang Q, et al. Evolution in medicinal chemistry of E-ring-modified Camptothecin analogs as anticancer agents. Eur J Med Chem. 2013;63:746-757. DOI:10.1016/j.ejmech.2013.01.058