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 [(2R)-2-[5-chloro-N-(4-chlorophenyl)sulfonyl-2-(hydroxymethyl)anilino]propoxy]carbonyl-ethyl-dimethylazanium ?
user
C21H27Cl2N2O5S+
assistant