Using CC1(C)CC=C(c2cc(C3(O)CCOCC3)ccc2NC(=O)c2ncc(C#N)[nH]2)CC1 to produce CC1(C)CC=C(c2cc(C3=CCOCC3)ccc2NC(=O)c2ncc(C#N)[nH]2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.