Using COc1cc(C2=Cc3ccc(OC)c(OC(C)C)c3CCC2)cc(OC)c1OC to produce COc1ccc2c(c1O)CCCC(c1cc(OC)c(OC)c(OC)c1)=C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.