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HIF-IN-1 (Compound 3c) is a hypoxia-inducible factor (HIF)-1 inhibitor. HIF-IN-1 suppresses HIF-1α protein accumulation without affecting the levels of HIF-1α mRNA. HIF-IN-1 shows no obvious cytotoxicity[1].

[1] Fuse S, et al. Design, synthesis, and evaluation of indeno[2,1-c]pyrazolones for use as inhibitors against hypoxia-inducible factor (HIF)-1 transcriptional activity. Bioorg Med Chem. 2020 Jan 1;28(1):115207. DOI:10.1016/j.bmc.2019.115207