Using CCCc1cc2cc(-c3cc(OC)c(OC)c(OC)c3)oc2cc1O to produce CCCc1cc2c(cc1O)OC(c1cc(OC)c(OC)c(OC)c1)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.