Using CCOC(=O)C1(Cc2ccccc2)CCN(CCNC(=O)OCc2ccccc2)CC1 to produce CCOC(=O)C1(Cc2ccccc2)CCN(CCN)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.