Using CCO, Nc1nc(COc2ccc(Cl)c(Cl)c2)nc2nccnc12 to produce O=c1[nH]c(COc2ccc(Cl)c(Cl)c2)nc2nccnc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.