You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
benzyl (2S)-4-[2-chloro-7-[5-fluoro-4-(trifluoromethyl)pyridin-3-yl]-6,8-dihydro-5H-pyrido[3,4-d]pyrimidin-4-yl]-2-(cyanomethyl)piperazine-1-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H24ClF4N7O2
assistant