You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named [(2R,4R)-4-hydroxy-2-propan-2-yl-1-oxa-9-azaspiro[5.5]undecan-9-yl]-(4-methoxy-1H-indol-2-yl)methanone is given. What is its corresponding molecular formula?
user
C22H30N2O4
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