You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[(E)-3-(4-chloro-2-fluorophenyl)prop-2-enoyl]-N-[(1S)-1-cyano-2-(2-oxopyrrolidin-3-yl)ethyl]diazinane-3-carboxamide into its molecular formula.
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C21H23ClFN5O3
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