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 1-[(5R,9S)-2-(5-fluoropyrimidin-2-yl)-6-oxa-2-azaspiro[4.5]decan-9-yl]pyrrolidin-2-one;2,2,2-trifluoroacetic acid .
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C18H22F4N4O4
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