Using COC(=O)[C@H]1CC[C@H](C(C)(O)c2ncc(Cl)cn2)CC1 to produce C=C(c1ncc(Cl)cn1)[C@H]1CC[C@H](C(=O)OC)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.