You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(6S,7S)-2-ethyl-7-[(3-phenylphenyl)methyl]-4,5,6,7-tetrahydroindazol-6-yl]methanesulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
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C23H27N3O2S
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