Using CCOC(=O)c1ccc(N2CCN(C(=O)N(CC)CC)CC2)cc1 to produce CCN(CC)C(=O)N1CCN(c2ccc(C(=O)O)cc2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.