You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as N-(2-benzoylphenyl)-2-[(5-cyclopropyl-4-methyl-1,2,4-triazol-3-yl)sulfanyl]acetamide using the IUPAC nomenclature.
user
C21H20N4O2S
assistant