You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3S)-6-chloro-5-(3-chloro-6-methoxypyridin-2-yl)-3-methyl-7-(trifluoromethyl)-1,3-dihydro-1,4-benzodiazepin-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H12Cl2F3N3O2
assistant