You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (E)-3-[4-(4-fluorophenyl)-5-(methoxymethyl)-1-methyl-6-oxo-2-propan-2-ylpyridin-3-yl]prop-2-enal by IUPAC nomenclature, provide its molecular formula.
user
C20H22FNO3
assistant