Using O=c1cc(O)c2ccccc2o1, C=CCOc1ccccc1C(O)CC to produce C=CCOc1ccccc1C(CC)c1c(O)c2ccccc2oc1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.