Using CC(=O)c1cccc2nc(CCc3ccccc3)[nH]c12 to produce O=C(C=Cc1ncc[nH]1)c1cccc2nc(CCc3ccccc3)[nH]c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.