Using Cc1c(C(=O)NOC(C)(C)C)ccc2c1NC(C)(C)C=C2 to produce Cc1c(C(=O)NOC(C)(C)C)ccc2c1NC(C)(C)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.