Using CC1(C)CC=C(c2cc(Br)ccc2NC(=O)c2nc(C#N)c[nH]2)CC1, O=C1CCCCC1 to produce CC1(C)CC=C(c2cc(C3(O)CCCCC3)ccc2NC(=O)c2nc(C#N)c[nH]2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.