Malachite green oxalate is a triphenylmethane dye which can be used to detect the release of phosphate in enzymatic reactions. Malachite green oxalate is also a potent and selective inhibitor of IKBKE, and inhibits its downstream targets such as IκBα, p65 and IRF3. Malachite green oxalate exhibits antitumor activity in vitro and in vivo[1][2][3].

[1]. Kozuka S, et, al. Permeability of dormant spores of Bacillus subtilis to malachite green and crystal violet. J Gen Microbiol. 1991 Mar; 137(3): 607-13. [2]. Takahashi S, et, al. Reversible off-on fluorescence probe for hypoxia and imaging of hypoxia-normoxia cycles in live cells. J Am Chem Soc. 2012 Dec 5; 134(48): 19588-91. [3]. Liu T, et, al. Identification of an IKBKE inhibitor with antitumor activity in cancer cells overexpressing IKBKE. Cytokine. 2019 Apr; 116: 78-87.