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 N-[(2R)-1-[3-[(6-ethynylquinazolin-2-yl)amino]-5-(1-methylpyrazol-4-yl)phenoxy]propan-2-yl]cyclopropanesulfonamide is given. What is its corresponding molecular formula?
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C26H26N6O3S
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