Using CC(C)(C)OC(=O)N[C@@H](C(=O)O)C(c1ccccc1)c1ccccc1 to produce CC(C)(C)OC(=O)N[C@@H](C(=O)O)C(C1CCCCC1)C1CCCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.