You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule (2R)-2-[(3,4-dichlorophenyl)methyl-[2-[(4-fluorophenyl)methylsulfanyl]acetyl]amino]-N-propylpropanamide ?
user
C22H25Cl2FN2O2S
assistant