You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-ethyl-5-phenyl-N-(2,2,2-trifluoroethyl)-4,5-dihydro-1,2-oxazole-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H15F3N2O2
assistant