Using CCOC(=O)CBr, Cn1c(-c2ccc(O)cc2C(F)(F)F)nnc1C(C)(C)Oc1c(F)cc(F)cc1F to produce CCOC(=O)COc1ccc(-c2nnc(C(C)(C)Oc3c(F)cc(F)cc3F)n2C)c(C(F)(F)F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.