You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-(3,4-dimethoxycyclohepta-1,3,5-trien-1-yl)ethyl-methylamino]-2-methyl-3-methylideneguanidine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H24N4O2
assistant