You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[2-(6,7-dihydro-5H-cyclopenta[f][1]benzofuran-3-yl)acetyl]-6-methylpiperidine-3-carboxamide into its molecular formula.
user
C20H24N2O3
assistant