Using OCCO, COc1cccc([C@]23CCNC[C@H]2CCC(=O)C3)c1 to produce COc1cccc([C@]23CCNC[C@H]2CCC2(C3)OCCO2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.