Using CCc1cn(CCOC2CCCCO2)c(C2CCN(C(=O)OC(C)(C)C)CC2)n1, ClCCl to produce CCc1cn(CCO)c(C2CCNCC2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.