You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-N,1-N-diethyl-2-N-[1-[2-(trifluoromethyl)phenyl]ethyl]propane-1,2-diamine by IUPAC nomenclature, provide its molecular formula.
user
C16H25F3N2
assistant