Using CCOC(=O)C1C(=O)CCN1C(=O)OCC, CCOP(=O)(CP(=O)(OCC)OCC)OCC to produce CCOC(=O)C1C(CP(=O)(OCC)OCC)=CCN1C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.