You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(2,4-difluorophenyl)methyl]-5-hydroxy-1-(3-methoxyhexyl)-4,6-dioxo-2,3-dihydropyrido[2,1-f][1,2,4]triazine-7-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H26F2N4O5
assistant