Using OCc1cccc(N2CCN(CCC3CCC4(CC3)OCCO4)CC2)c1, CI to produce COCc1cccc(N2CCN(CCC3CCC4(CC3)OCCO4)CC2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.