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Under IUPAC nomenclature, a molecule named tert-butyl 2-[[7-acetyl-10-hydroxy-12-oxo-2-[[4-(trifluoromethyl)phenyl]methyl]-4-oxa-1-azatricyclo[7.3.1.05,13]trideca-5,7,9(13),10-tetraene-11-carbonyl]amino]acetate is given. What is its corresponding molecular formula?
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C28H27F3N2O7
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