Using CCCCNc1nccc(N2CC(N)C2)n1, CCCCNc1nccc(N2CC(NC(=O)OC(C)(C)C)C2)n1 to produce NCCCCc1nccc(N2CC(N)C2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.