Using CC(=O)[C@H]1CC[C@H]2[C@@H]3CC[C@H]4C[C@H](O)[C@@H](OCCCl)C[C@]4(C)[C@H]3C(=O)C[C@]12C, OCCO to produce CC1([C@H]2CC[C@H]3[C@@H]4CC[C@H]5C[C@H](O)[C@@H](OCCCl)C[C@]5(C)[C@H]4C(=O)C[C@]23C)OCCO1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.