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