You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3,4,5-triethoxy-N-[3-(furan-2-yl)-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazol-6-yl]benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H21N5O5S
assistant