Using OC1CCc2nccn2C1, O=C(CCl)N1CCc2nc(NC3Cc4ccccc4C3)ncc2C1 to produce O=C(COC1CCc2nccn2C1)N1CCc2nc(NC3Cc4ccccc4C3)ncc2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.