You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 4-(3-ethyl-1,2,4-thiadiazol-5-yl)-N-[(3-fluoro-4-methylphenyl)methyl]-N'-methylpiperazine-1-carboximidamide is given. What is its corresponding molecular formula?
user
C18H25FN6S
assistant