Using COc1ccccc1-c1cc(NC(=O)C2CCN(C(=O)OCc3ccccc3)CC2)ncn1 to produce COc1ccccc1-c1cc(NC(=O)C2CCNCC2)ncn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.