Using CCCn1c(Oc2cccc(C(C)=O)c2)nc2nc(C3CCCC3)[nH]c2c1=O to produce CCCn1c(Oc2cccc(C(C)O)c2)nc2nc(C3CCCC3)[nH]c2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.