You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance ethyl 3-[(2-oxo-5-thiophen-2-yl-1,3,4-oxadiazol-3-yl)methyl]-1-benzofuran-2-carboxylate .
user
C18H14N2O5S
assistant