Using CN(C(=O)c1cccc(C2CCN(C(=O)OC(C)(C)C)CC2)n1)C1CCCc2ccccc21 to produce CN(C(=O)c1cccc(C2CCNCC2)n1)C1CCCc2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.