Using C=CCBr, CCC(CC)c1cccc2c1[nH]c(=O)n2C(=O)OC(C)(C)C to produce C=CCn1c(=O)[nH]c2cccc(C(CC)CC)c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.