You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 2'-[(4-amino-3-chloro-2-fluorophenyl)methyl]-6-methylspiro[1,4-dihydroquinoline-3,1'-cyclopropane]-2-one into molecular formula.
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C19H18ClFN2O
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