You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-[2-(6-methoxy-2,3-dihydro-1H-inden-5-yl)imidazol-1-yl]-3H-1,3-benzoxazol-2-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H17N3O3
assistant