You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2R)-2-[4-(2-oxoimidazolidin-1-yl)piperidin-1-yl]-N-(2,2,2-trifluoroethyl)propanamide into its molecular formula.
user
C13H21F3N4O2
assistant