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CH5164840 is a potent and selective HSP90 inhibitor. CH5164840 showed remarkable antitumor activity against NSCLC cell lines and xenograft models. CH5164840 has potent antitumor activity and is highly effective in combination with erlotinib against NSCLC tumors with EGFR overexpression and mutations.

CH5164840 (16) shows high binding affinity for N-terminal Hsp90a (Kd = 0.52 nM) and strong anti-proliferative activity against human cancer cell lines (HCT116 IC50 = 0.15 μM, NCI-N87 IC50 = 0.066 μM). CH5164840 (16) is orally active (t1/2 = 2.64 h) with potent antitumor efficacy[1].

[1] Atsushi Suda, et al. Design and synthesis of novel macrocyclic 2-amino-6-arylpyrimidine Hsp90 inhibitors. Bioorg Med Chem Lett. 2012 Jan 15;22(2):1136-41. DOI:10.1016/j.bmcl.2011.11.100