You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named [(2S)-1-(tert-butylamino)-1-oxopropan-2-yl] 4-oxo-3H-phthalazine-1-carboxylate is given. What is its corresponding molecular formula?
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C16H19N3O4
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