Methods and compositions for treating inflammatory and proliferative diseases, enabling treatment of MDR tumor cells by using combination of compounds, or a bifunctional compound, that inhibits both fatty acid metabolism and glycolysis. In particular, the invention combines or links a glycolysis inhibitor that is, or that is derived from, hypoglycin A (also referred to as hypoglycine A) and a fatty acid metabolism inhibitor. Preferably, the invention provides bifunctional compounds that link a moiety having the functionality of an oxirane carboxylic acid compound to a moiety having the functionality a hypoglycin A derivative. In specific embodiments, the invention provides a bifunctional compound that links a moiety having the functionality of etomoxir to a moiety having the functionality of hypoglycin A.
