You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[1-(3-amino-4-fluorophenyl)-3-cyclopropyl-1-pyridin-3-ylpropyl]-2-methylpropane-2-sulfinamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H28FN3OS
assistant