You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[[3,5-bis(trifluoromethyl)phenyl]methyl]-N-[[2-[5-ethyl-2-(methyliminomethyl)pyrimidin-4-yl]-5-(trifluoromethyl)phenyl]methyl]-2-methyltetrazol-5-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H23F9N8
assistant