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 1-[(S)-(2-methoxyphenyl)-(1-methylimidazol-2-yl)methyl]-3-[[3-(trifluoromethyl)phenyl]methyl]urea using the IUPAC nomenclature.
user
C21H21F3N4O2
assistant