Using CN(C1CCN(c2ccncc2)CC1)N1CCN(C(=O)OCc2ccccc2)CC1=O to produce CN(C1CCN(c2ccncc2)CC1)N1CCNCC1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.