Using CCOC(=O)c1ccccc1CBr, CCOC(=O)c1cnc2c(O)cccn2c1=O to produce CCOC(=O)c1ccccc1COc1cccn2c(=O)c(C(=O)OCC)cnc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.