You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(3,5-dibromo-4-phenylmethoxyphenyl)methyl]-N',N'-dimethylethane-1,2-diamine;dihydrochloride is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H24Br2Cl2N2O
assistant