You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[1-[1-(benzenesulfonyl)indol-3-yl]ethenyl]-N'-[(2R,4S)-4-(chloroamino)pentan-2-yl]ethanimidamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H27ClN4O2S
assistant