You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[3-acetyl-5-(5-methylpyridin-2-yl)phenyl]-N,N'-diamino-2,2-difluoropropanimidamide;2-methylpropan-1-ol by IUPAC nomenclature, provide its molecular formula.
user
C21H29F2N5O2
assistant