Using O=C(CCCN1CCC(C(O)(c2ccccc2)c2ccccc2)CC1)c1ccc2ccccc2c1 to produce O=C(CCCN1CCC(=C(c2ccccc2)c2ccccc2)CC1)c1ccc2ccccc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.