You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[[3-[(2,5-dichlorophenyl)methyl]-2-methylimidazol-4-yl]methyl]-2-methylpropan-1-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H21Cl2N3
assistant