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 identified by 2-[[5-(5-chloro-1-benzofuran-2-yl)-4-methyl-1,2,4-triazol-3-yl]sulfanyl]-1-(4-methoxyphenyl)ethanone ?
user
C20H16ClN3O3S
assistant