You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methyl-N-[5-(naphthalen-2-ylsulfamoyl)-1,3,4-thiadiazol-2-yl]propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H16N4O3S2
assistant