Using CCCCCN(CCC12CC3CC(CC(C3)C1)C2)C(=O)[C@H]1CCCN1C(=O)OC(C)(C)C to produce CCCCCN(CCC12CC3CC(CC(C3)C1)C2)C(=O)[C@H]1CCCN1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.