SNS-314 (Free base). SNS-314 (Free base), A potent pan-Aurora kinase inhibitor, Alternate Name/Synonyms: (3-chlorophenyl)-3-(5-(2-(thieno[3,2-d]pyrimidin-4-ylamino)ethyl)thiazol-2-yl)urea mesyalte, CAS Number: 1057249-41-8, Purity: G98% by HPLC, 25mg