Using CC(=O)OC(C)=O, C=C(C)[C@@H]1CC[C@]2(C(=O)O)CC[C@]3(C)[C@H](CC[C@@H]4[C@@]5(C)CC[C@H](O)C(C)(C)[C@@H]5CC[C@]43C)[C@@H]12 to produce C=C(C)C1CCC2(C(=O)O)CCC3(C)C(CCC4C5(C)CCC(OC(C)=O)C(C)(C)C5CCC43C)C12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.