You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-(3-fluoro-2-methylpyridin-4-yl)-2-[4-(2-methylpropoxy)-6-oxo-3-propan-2-ylpyridazin-1-yl]acetamide into its molecular formula.
user
C19H25FN4O3
assistant