T-1101 tosylate (TAI-95 tosylate) is the tosylate salt form of T-1101. T-1101 tosylate is an orally active inhibitor for mitose regulating highly expressed oncoprotein 1 (Hec1) . T-1101 tosylate blocks the interaction between Hec1 and NEK2 , exhibits cytotoxicity in human liver cancer cells with GI 50 of 15-70 nM. T-1101 tosylate induces apoptosis in Huh-7. T-1101 tosylate exhibits antitumor efficacy in mouse models.