You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 2-(3,4-dihydro-1H-isochromen-1-yl)-N-(3-methyl-2-oxo-1,3-benzoxazol-5-yl)acetamide is given. What is its corresponding molecular formula?
user
C19H18N2O4
assistant