You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named tert-butyl 9-[1-[1-[(4-methoxyphenyl)methyl]-2,6-dioxopiperidin-3-yl]-3-methyl-2-oxobenzimidazol-4-yl]-3,9-diazaspiro[5.5]undecane-3-carboxylate by IUPAC nomenclature, provide its molecular formula.
user
C35H45N5O6
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