Using O=Cc1cccc(O)c1O, CC1(C)CCC(C)(C)c2cc(CCl)ccc21 to produce CC1(C)CCC(C)(C)c2cc(COc3c(O)cccc3C=O)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.