Stafia-1-dipivaloyloxymethyl ester (compound 27, 0-200 μM) decreases pSTAT5a expression significantly, and has no obvious inhibition on pSTAT5b In Vitro Stafia-1-dipivaloyloxymethyl ester (compound 27, 0-200 μM) decreases pSTAT5a expression significantly, and has no obvious inhibition on pSTAT5b. MCE has not independently confirmed the accuracy of these methods. They are for reference only. Western Blot AnalysisCell Line: STAT5a-GFP-transfected K562 cells. Concentration: 0-200 μM. Incubation Time: Result: Decreased pSTAT5a expression. Form:Oil IC50& Target:STAT5a