You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-[4-(butanoylamino)phenyl]-1,3-thiazol-2-yl]-2-oxo-1H-quinoline-4-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H20N4O3S
assistant