Using C[O-], CC(C)(C)OC(=O)N1CCN(c2cc(Cl)nc3ccnn23)CC1 to produce COc1cc(N2CCN(C(=O)OC(C)(C)C)CC2)n2nccc2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.