Using COc1ccccc1N1CCN(CC2CCCN(C(=O)c3ccccc3)C2)CC1 to produce COc1ccccc1N1CCN(CC2CCCN(Cc3ccccc3)C2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.