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-[(4-cyclopropyl-5-methyl-1,2,4-triazol-3-yl)sulfanyl]-1-[2,5-dimethyl-1-[4-(trifluoromethyl)phenyl]pyrrol-3-yl]ethanone ?
user
C21H21F3N4OS
assistant