Using COc1ccc2cc(C3(O)CCN(Cc4ccccc4)CC3)ccc2c1 to produce Oc1ccc2cc(C3=CCN(Cc4ccccc4)CC3)ccc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.