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Carboxylesterase-IN-3 (compound 4y) is a potent inhibitor of Carboxylesterase Notum with an IC50 less than or equal to 10 nM. Notum is a negative regulator of Wnt signaling acting through the hydrolysis of a palmitoleoylate ester, which is required for Wnt activity. Carboxylesterase-IN-3 has the potential for the research of cancer disease[1].

[1] Steadman D, et al. Virtual Screening Directly Identifies New Fragment-Sized Inhibitors of Carboxylesterase Notum with Nanomolar Activity. J Med Chem. 2022;65(1):562-578. DOI:10.1021/acs.jmedchem.1c01735