You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 3-(2-chloro-6-fluorophenyl)-N-[(2S)-2-(furan-2-yl)-2-pyrrolidin-1-ylethyl]-5-methyl-1,2-oxazole-4-carboxamide .
user
C21H21ClFN3O3
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