Compound 18h [4-(3-((3-(2-fluoro-3-((N-methylsulfamoyl)amino)benzyl)-4-methyl-2-oxo-2H-chromen-7-yl)oxy) propoxy)-3-(phenylsulfonyl)-1,2,5-oxadiazole 2-oxide] was proven to be more potent than the clinical compound RO5126766 in MDA-MB-231 cells. 
RO5126766
Compound 18h [4-(3-((3-(2-fluoro-3-((N-methylsulfamoyl)amino)benzyl)-4-methyl-2-oxo-2H-chromen-7-yl)oxy) propoxy)-3-(phenylsulfonyl)-1,2,5-oxadiazole 2-oxide] was proven to be more potent than the clinical compound RO5126766 in MDA-MB-231 cells. 
RO5126766