You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 5-acetyl-3-[C-(2,3-dihydro-1,4-benzodioxin-6-yl)-N-[4-[(dimethylamino)methyl]phenyl]carbonimidoyl]-1,3-dihydroindol-2-one by IUPAC nomenclature, provide its molecular formula.
user
C28H27N3O4
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