You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (2S)-2-[(2,6-dichlorophenyl)methyl-[2-[(4-methoxyphenyl)methylsulfanyl]acetyl]amino]-N-methylpropanamide .
user
C21H24Cl2N2O3S
assistant