You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(furan-2-ylmethyl)-4-[[7-propyl-3-(trifluoromethyl)-1,2-benzoxazol-6-yl]oxy]butanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H21F3N2O4
assistant