LEXINGTON, Mass.--(BUSINESS WIRE)--Synta Pharmaceuticals Corp. (NASDAQ: SNTA) today announced that preclinical results presented at the AACR-EORTC-NCI Molecular Targets and Cancer Therapeutics Conference show that ganetespib, a potent Hsp90 inhibitor, is highly effective in overcoming mechanisms of resistance in models of multiple oncogene addicted tumors.