You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 1-[2-(5-acetyl-6-hydroxy-1-benzofuran-3-yl)-6-hydroxy-1-benzofuran-5-yl]ethanone using the IUPAC nomenclature.
user
C20H14O6
assistant