You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-(4,5-dihydro-1,3-oxazol-2-yl)-4-(trifluoromethyl)phenyl]-[1-[4-(trifluoromethyl)phenyl]butyl]phosphane The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H20F6NOP
assistant