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FTI277 HCl; methyl (5-(((R)-2-amino-3-mercaptopropyl)amino)-[1,1'-biphenyl]-2-carbonyl)-L-methioninate hydrochloride; CAS No.: 180977-34-8;FTI277 HCl. PROPERTIES: FTI277 HCl is a white or almost white crystalline powder with a molecular formula of C22H25FN4O2 HCl and a molecular weight of 441.93 g/mol. It is moderately soluble in water and highly soluble in organic solvents. Storage recommendations include keeping it at -20 C in a desiccator to prevent moisture absorption. Safety considerations involve using standard laboratory protective equipment due to its potential to cause respiratory irritation if aerosolized. APPLICATIONS: FTI277 HCl is a farnesyltransferase inhibitor targeting RAS signaling pathways. In cancer research, it shows activity against various tumor cell lines expressing activated RAS mutations (source: Clinical Cancer Research). Preclinical studies have evaluated its efficacy in combination with other signaling pathway inhibitors, particularly in pancreatic and colorectal cancer models. FTI277 HCl also serves as a tool compound for studying post-translational modification mechanisms of RAS proteins and their role in tumorigenesis (source: Oncogene).