You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(5-amino-2,4,6,7-tetramethyl-3H-1-benzofuran-2-yl)methyl]-N-(3,3-diphenylpropyl)piperidin-4-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C33H43N3O
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