You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 5-fluoro-4-N-[[(3S)-1-methylpiperidin-3-yl]methyl]-2-N-[3-(triazol-1-yl)phenyl]pyrimidine-2,4-diamine by IUPAC nomenclature, provide its molecular formula.
user
C19H23FN8
assistant