You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-methyl-N-[3-[5-methyl-1-(3-methylsulfanylphenyl)triazol-4-yl]-1,2,4-thiadiazol-5-yl]benzamide by IUPAC nomenclature, provide its molecular formula.
user
C20H18N6OS2
assistant