VT02956 is a LATS inhibitor ( IC 50 : 0.76 nM for LATS1, 0.52 nM for LATS2). VT02956 targets the Hippo pathway. VT02956 inhibits ESR1 expression and growth of ER+ breast cancer cell lines and patient-derived tumor organoids. VT02956 is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.