Using COC1c2cccc(NC(=O)c3ccc(Cl)s3)c2C(=O)N1CCC1CCN(C(=O)OC(C)(C)C)CC1 to produce O=C(Nc1cccc2c1C(=O)N(CCC1CCNCC1)C2)c1ccc(Cl)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.