Using CCOC(C)=O, Cc1nc(NC2CCN(Cc3ccccc3)C2)ncc1C=O to produce CCOC(=O)/C=C/c1cnc(NC2CCN(Cc3ccccc3)C2)nc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.