Using O=CC1CC1, CC(C)(C)OC(=O)N1CCC(N2CCNCC2)CC1 to produce CC(C)(C)OC(=O)N1CCC(N2CCN(CC3CC3)CC2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.