Using CN(CCC=C1c2ccccc2CCn2cc(C#N)cc21)C(=O)OCC(Cl)(Cl)Cl to produce CNCCC=C1c2ccccc2CCn2cc(C#N)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.