Using COc1ccc(-c2cccc3nc(Nc4ccc(C=O)cc4)nn23)cc1, COCCN to produce COCCNCc1ccc(Nc2nc3cccc(-c4ccc(OC)cc4)n3n2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.