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 2-[[5-(4-chlorophenyl)-4-(2-methoxyethyl)-1,2,4-triazol-3-yl]sulfanyl]-N-[(1R)-1-phenylethyl]acetamide ?
user
C21H23ClN4O2S
assistant