Using C=Cc1ccc2c(c1)[C@@]13CCCC[C@H]1[C@@H](C2)N(C(=O)OC(C)(C)C)CC3 to produce CCc1ccc2c(c1)[C@@]13CCCC[C@H]1[C@@H](C2)N(C(=O)OC(C)(C)C)CC3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.