You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 1,4-dimethyl-7-(2-methylpyridin-4-yl)-3,5-dihydro-2H-pyrido[3,4-e][1,4]diazepine is given. What is its corresponding molecular formula?
user
C16H20N4
assistant