You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-(6-ethyl-5-fluoropyrimidin-4-yl)sulfanyl-N-(2-methoxyethyl)-1,3,4-thiadiazol-2-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C11H14FN5OS2
assistant