Using CC(C)(C)OC(=O)OC(=O)OC(C)(C)C, COC(=O)c1nnc(N2CCNCC2)[nH]1 to produce COC(=O)c1nnc(N2CCN(C(=O)OC(C)(C)C)CC2)[nH]1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.