Description_x000D_ Biochem/physiol Actions_x000D_ CA3 is a potent and selective inhibitor of YAP1 (Hippo co-activator Yes-associated protein 1) that inhibits YAP1 expression and transcriptional activity in esophageal adenocarcinoma (EAC) cell lines. CA3 potently inhibits growth, induces apoptosis in radiation resistant CSC (cancer stem cell) enriched EAC cells. It inhibits tumor growth of in xenograft model with no apparent toxicity.