You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named ethyl 2-[2-[4-(dimethylamino)phenyl]-6-oxopyrano[3,2-f][1,3]benzoxazol-8-yl]acetate is given. What is its corresponding molecular formula?
user
C22H20N2O5
assistant