You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3-[6-ethyl-2-[(6-ethyl-1,3-benzodioxol-5-yl)sulfanyl]-8-methyl-2,7-dihydro-1H-imidazo[4,5-b]azepin-3-yl]propan-1-amine by IUPAC nomenclature, provide its molecular formula.
user
C22H30N4O2S
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