Using CC(=O)Nc1cccc(C2=CCN(CCCNC(=O)OC(C)(C)C)CC2)c1 to produce CC(=O)Nc1cccc(C2=CCN(CCCN)CC2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.