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 7-(3-chloropyridin-2-yl)-N-[4-(difluoromethyl)phenyl]-2-(ethoxymethyl)pyrido[2,3-d]pyrimidin-4-amine .
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C22H18ClF2N5O
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