Using CCC(CC)C(O)c1c(O)cc(C(C)C)c(OC(C)=O)c1C(C)C to produce CCC1(CC)Cc2c(cc(C(C)C)c(OC(C)=O)c2C(C)C)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.