Using C[C@@H](COc1cc(Cl)c(NC(=O)c2cc(F)c(OCC3CC3)cc2F)cn1)NC(=O)OC(C)(C)C to produce C[C@@H](COc1cc2oc(-c3cc(F)c(OCC4CC4)cc3F)nc2cn1)NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.