选择性竞争性HSP90抑制剂。;Selective, competitive HSP90 inhibitor.;BIIB021(CNF2024)是口服活性的HSP90抑制剂,Ki和EC50分别为1.7 nM和38 nM。;BIIB021 is an orally available, fully synthetic small-molecule inhibitor of HSP90 with Ki and EC50 of 1.7 nM and 38 nM, respectively.A selective large conductance calcium activated potassium channel activator