Using C=CC(C)(C)O, Cc1c(O)cc2c(c1C)OC(C)(C)CC2 to produce CC(C)=CCc1c(O)c(C)c(C)c2c1CCC(C)(C)O2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.