Using C=CCBr, CC[C@]12CC[C@@H]3c4ccc(OC)cc4CC[C@H]3[C@@H]1CC[C@@H]2O to produce C=C(C)OC1CC[C@H]2[C@@H]3CCc4cc(OC)ccc4[C@H]3CC[C@]12CC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.