You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1,2,3,6-tetramethyl-5-[2-[4-(trifluoromethyl)phenyl]ethyl]-3,4-dihydro-1H-pyrido[4,3-b]indole is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H27F3N2
assistant