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Under IUPAC nomenclature, a molecule named 4-[[2-(2,2-dimethylpropanoyloxymethyl)-4-oxo-3,6,7,8-tetrahydrocyclopenta[g]quinazolin-6-yl]-prop-2-ynylamino]benzoic acid is given. What is its corresponding molecular formula?
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C27H27N3O5
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