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