Using C[C@]12CC[C@H]3[C@@H](CC=C4NC(=O)CC[C@@]43C)[C@@H]1CC[C@@H]2C(=O)O to produce C[C@]12CCC(=O)N[C@@H]1CC[C@@H]1[C@@H]2CC[C@]2(C)[C@@H](C(=O)O)CC[C@@H]12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.