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-[(2R)-2-(azepan-1-yl)-2-thiophen-3-ylethyl]-N'-[3-(trifluoromethyl)phenyl]oxamide using the IUPAC nomenclature.
user
C21H24F3N3O2S
assistant