You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(furan-2-ylmethyl)-3-[3-(4-methylphenyl)-5-sulfanylidene-1H-1,2,4-triazol-4-yl]-N-prop-2-ynylpropanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H20N4O2S
assistant