You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 1-(4-acetyl-3,5-dimethyl-1H-pyrrol-2-yl)-2-[[5-(4-chlorophenyl)-4-(2-methoxyethyl)-1,2,4-triazol-3-yl]sulfanyl]ethanone .
user
C21H23ClN4O3S
assistant