Using Cn1c(COc2cccc(C(=O)O)c2)nc2ccc(Oc3ccc(Cl)nc3)cc21, CO to produce COc1ccc(Oc2ccc3nc(COc4cccc(C(=O)O)c4)n(C)c3c2)cn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.