You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(7E)-8-(benzenesulfinyl)-4-N,4-N,2,5-tetramethyl-6,9-dihydro-5H-1,3,6-triazonine-4,7-diamine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H23N5OS
assistant