Using COS(=O)(=O)OC, Clc1ccc2nc(Cl)c3[nH]c4ccccc4c3c2c1 to produce Cn1c2ccccc2c2c3cc(Cl)ccc3nc(Cl)c21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.