You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-(2,3-dichlorophenyl)sulfonyl-N-[(4-methyl-1,3-thiazol-2-yl)methyl]piperazine-1-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H18Cl2N4O3S2
assistant