Using CC(C)(C)OC(=O)NC(C)(C)C(=O)N[C@H](COCc1ccccc1)C(=O)O to produce CC(C)(C)OC(=O)NC(C)(C)C(=O)NC(COCC1CCCCC1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.