Using CCOC(=O)CBr, ON=Cc1nc(NCc2ccc3c(c2)OCO3)c2cc(Cl)ccc2n1 to produce CCOC(=O)CON=Cc1nc(NCc2ccc3c(c2)OCO3)c2cc(Cl)ccc2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.