Using COc1cc2nccc(Oc3ccc(C)nc3C(O)c3cccc(C)n3)c2cc1OC to produce COc1cc2nccc(Oc3ccc(C)nc3C(=O)c3cccc(C)n3)c2cc1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.