You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 3-[2-[(2,5-difluorophenyl)carbamoylamino]ethyl-(oxan-4-yl)amino]-N,N-dimethylpyrrolidine-1-carboxamide ?
user
C21H31F2N5O3
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