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CREARY, X. (1988). ChemInform Abstract: Reaction of Organometallic Reagents with Ethyl Trifluoroacetate and Diethyl Oxalate. Formation of Trifluoromethyl Ketones and α-Keto Esters via Stable Tetrahedral Adducts. ChemInform, 19(15). doi:10.1002/chin.198815157 
10.1002/chin.198815157