You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[cyclopropyl(cyclopropylmethyl)amino]-1-(5-piperidin-1-ylsulfonyl-2,3-dihydroindol-1-yl)ethanone by IUPAC nomenclature, provide its molecular formula.
user
C22H31N3O3S
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