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 3-[(1R)-1,2-bis(4-methylphenyl)-2-oxoethyl]sulfanyl-4-cyclopropyl-1H-1,2,4-triazol-5-one .
user
C21H21N3O2S
assistant