Using CC(=O)CCCN1CCN(C(c2ccccc2)c2ccccc2)CC1 to produce CC(O)CCCN1CCN(C(c2ccccc2)c2ccccc2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.