You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by N-[6-(4-fluorophenyl)pyridazin-3-yl]-4-methyl-5-[(4-methylpiperidin-1-yl)methyl]-1,3-thiazol-2-amine ?
user
C21H24FN5S
assistant