Using CI, CC(C)(O)c1cnc(N2C[C@@]3(CCC[C@](C)(Cn4cnc5ccc(C#N)cc54)C3)OC2=O)cn1 to produce COC(C)(C)c1cnc(N2C[C@@]3(CCC[C@](C)(Cn4cnc5ccc(C#N)cc54)C3)OC2=O)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.