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2,2′-Dihydroxychalcone, a flavonoid, is a glutathione S-transferase (GST) inhibitor with an IC50 of 28.9 μM in human colon cancer cells. 2,2′-Dihydroxychalcone induces cell cycle arrest and apoptosis in prostate cancer cells. 2,2′-Dihydroxychalcone has anticancer and anti-inflammatory properties[1][2].

[1] Ahmed Q Haddad, et al. Antiproliferative mechanisms of the flavonoids 2,2'-dihydroxychalcone and fisetin in human prostate cancer cells. Nutr Cancer. 2010;62(5):668-81. DOI:10.1080/01635581003605524
[2] Kenneth Goh, et al. 2,2'-Dihydroxychalcone, a glutathione transferase inhibitor, sensitises human colon adenocarcinoma cells to chlorambucil and melphalan, but not to actinomycin D. Mol Med Rep. 2008 Jul-Aug;1(4):575-9. PMID:21479453