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-(2-ethoxyethyl)-5-N-ethyl-7-N-(4-fluoro-3-methylphenyl)-5-N-methylpyrazolo[4,3-d]pyrimidine-5,7-diamine .
user
C19H25FN6O
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