Using O=Cc1ccccc1, CCOC(=O)c1cc2c(nc1C)CCCCC2 to produce CCOC(=O)c1cc2c(nc1C)/C(=C/c1ccccc1)CCCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.