You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[1-[5-chloro-2-isocyanato-4-(trifluoromethyl)phenyl]propan-2-yl]-2H-azirine is the IUPAC name of a molecule. Please give its molecular formula.
user
C13H10ClF3N2O
assistant