You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [4-(1H-imidazol-2-yl)piperidin-1-yl]-[2-[(4-methylphenoxy)methyl]furan-3-yl]methanone into molecular formula.
user
C21H23N3O3
assistant