You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[4-[2-(chloroamino)ethylamino]imidazo[1,2-a]quinoxalin-1-yl]benzene-1,2-diol The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H16ClN5O2
assistant