You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(2-aminoethyl)-1-(4-fluorobenzoyl)-4-[(2-methylphenyl)methyl-(2-methylpropyl)amino]pyrrolidine-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H35FN4O2
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