Using CCOC(=O)C1(N(NC(=O)OC(C)(C)C)C(=O)OC(C)(C)C)CC(=O)NC1=O to produce CCOC(=O)C1(NN)CC(=O)NC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.