You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3,5-difluoro-N-methyl-4-[7-methyl-3-(morpholin-2-ylmethyl)-5,6,7,8-tetrahydroimidazo[1,2-a]pyridin-2-yl]benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H26F2N4O2
assistant