Using O=C([O-])[O-], COc1ccc(COCc2nc(C(C)C)c(Sc3cc(Cl)cc(Cl)c3)[nH]2)cc1 to produce COc1ccc(COCc2nc(C(C)C)c(Sc3cc(Cl)cc(Cl)c3)n2C)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.