You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (2S)-1-(3,4-dichlorophenyl)-4-(2-fluoro-5-nitrobenzoyl)-N-(thiophen-2-ylmethyl)piperazine-2-carboxamide ?
user
C23H19Cl2FN4O4S
assistant