You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(2,6-diethylphenyl)-2-[3-oxo-6-(2-propyl-1,3-thiazol-4-yl)-1,4-benzoxazin-4-yl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H29N3O3S
assistant