Using Cn1c(=O)c2c(ncn2CCCCC2CO2)n(C)c1=O, COCCOC to produce Cn1c(=O)c2c(ncn2CCCCC(O)CO)n(C)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.