You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-[(2-fluorophenyl)methyl]-9-methyl-2-[3-(trifluoromethyl)-1,2-dihydrotriazol-5-yl]purine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H13F4N7
assistant