Using CCc1cnc2c(C3CCCNC3)cccc2c1, CC(C)(C)OC(=O)N1CCC(=O)C1 to produce CCc1cnc2c(C3(O)CCN(C(=O)OC(C)(C)C)C3)cccc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.