Using COc1ccc2c(c1)CCN(C1CCN(Cc3ccccc3)CC1)C(=O)N2 to produce COc1ccc2c(c1)CCN(C1CCNCC1)C(=O)N2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.