Using C=CCOC(=O)CC1(CNC(=O)OC(C)OC(=O)C(C)C)CCCCC1 to produce CC(OC(=O)NCC1(CC(=O)O)CCCCC1)OC(=O)C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.