Using C=C(C)OC(=O)CC, COc1cc2c(c(OC(C)=O)c1)[C@H]1CC[C@]3(C)C(=O)CC[C@H]3[C@@H]1CC2 to produce CCC(=O)OC1=CC[C@H]2[C@@H]3CCc4cc(OC)cc(OC(C)=O)c4[C@H]3CC[C@]12C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.