You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-[5-(5-methoxy-2-methyl-1-benzofuran-3-yl)-1,2,4-oxadiazol-3-yl]-2H-[1,2,4]triazolo[4,3-a]pyridin-3-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H13N5O4
assistant