You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6,7-dichloro-2,3-dimethoxy-5-[[4-[(4-methylpiperazin-1-yl)methyl]triazol-1-yl]methyl]quinoxaline The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H23Cl2N7O2
assistant