Using CC(=O)O[C@H]1CC[C@]2(C)[C@H]3CC[C@@H]4C5=C(C(C)C)C(=O)C[C@]5(C=O)CC[C@@]4(C)[C@]3(C)CC[C@H]2C1(C)C, CCOC(=O)C(C)P(=O)(OCC)OCC to produce CCOC(=O)/C(C)=C/[C@@]12CC[C@]3(C)[C@H](CC[C@@H]4[C@@]5(C)CC[C@H](OC(C)=O)C(C)(C)[C@@H]5CC[C@]43C)C1=C(C(C)C)C(=O)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.