You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-9-chloro-2-(4-methylphenyl)-2,7-bis(trifluoromethyl)-3H-pyrido[1,2-a][1,3,5]triazin-4-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H10ClF6N3O
assistant