Using O=C(O)C[C@H]1CC[C@H](OC(=O)N2CCc3cc(NC(=O)Nc4ccccc4F)ccc3C2)CC1, CC1(C)OC(=O)CC(=O)O1 to produce CCOC(=O)CC(=O)C[C@H]1CC[C@H](OC(=O)N2CCc3cc(NC(=O)Nc4ccccc4F)ccc3C2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.