Using CCOC(=O)c1cn(C(C)CO)c2c(Cl)c(Cl)ncc2c1=O to produce CCOC(=O)c1cn2c3c(c(Cl)ncc3c1=O)OCC2C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.