You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[8-[(1,1-dioxothian-4-yl)methylamino]-6-(2-fluorophenoxy)imidazo[1,2-b]pyridazin-3-yl]-2-methylbenzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H26FN5O4S
assistant