You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-(2,4-dichlorophenyl)-1,3-thiazol-2-yl]-4-(1,3-dioxobenzo[de]isoquinolin-2-yl)butanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H17Cl2N3O3S
assistant