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 [(2Z)-2-[(1-ethylindol-3-yl)methylidene]-4-methyl-3-oxo-1-benzofuran-6-yl] 2-thiophen-2-ylacetate .
user
C26H21NO4S
assistant