Using C=CCBr, CCOC(=O)C(C)(C)Cc1c(SC(C)(C)C)c2cc(O)ccc2n1Cc1ccc(Cl)cc1 to produce C=CCOc1ccc2c(c1)c(SC(C)(C)C)c(CC(C)(C)C(=O)OCC)n2Cc1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.