Using Cc1c(C2=CCN(C(=O)OC(C)(C)C)CC2)ccn2c(CC3CC3)nnc12 to produce Cc1c(C2CCN(C(=O)OC(C)(C)C)CC2)ccn2c(CC3CC3)nnc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.