Using COc1ccc(C(c2ccc(OC)cc2)N2CCN(C=O)CC2)cc1 to produce COc1ccc(C(c2ccc(OC)cc2)N2CCNCC2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.