Using CC(=O)OC(C)=O, COC(=O)/C=C/[C@H]1CC[C@]2(O)[C@@H]3CC[C@@H]4C[C@@H](O)CC[C@]4(C)[C@H]3CC[C@]12C to produce COC(=O)/C=C/[C@H]1CC[C@]2(O)[C@@H]3CC[C@@H]4C[C@@H](OC(C)=O)CC[C@]4(C)[C@H]3CC[C@]12C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.