BIIB021, an orally available, fully synthetic small-molecule inhibitor of the heat shock protein Hsp90. - Lundgren K; Zhang H; Brekken J; Huser N; Powell RE; Timple N; Busch DJ; Neely L; Sensintaffar JL; Yang YC; McKenzie A; Friedman J; et al. (Molecular cancer therapeutics, 2009)