You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[1-[4-[(4-carbamoylphenyl)methoxy]phenyl]sulfonyl-5-methoxy-2,3-dihydroindol-3-yl]propanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H26N2O7S
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