You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(2S)-1-[4-(4-chlorophenyl)sulfonylpiperazin-1-yl]-1-oxopropan-2-yl]-3,5-dimethyl-1,2-oxazole-4-sulfonamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H23ClN4O6S2
assistant