Using OC(Cc1ccccc1)(c1cccc(Cl)c1)c1cn(C(c2ccccc2)(c2ccccc2)c2ccccc2)cn1 to produce Clc1cccc(C(=Cc2ccccc2)c2c[nH]cn2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.