You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-N-[2-(1,3-benzodioxol-5-yl)ethyl]-4-N,6-dimethyl-6,7-dihydro-3H-1,3,5-triazepine-2,4-diamine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H21N5O2
assistant