Using CCCCn1c(=O)n(Cc2ccccc2)c(=O)c2c3n(nc21)CCN3 to produce CCCCn1c(=O)[nH]c(=O)c2c3n(nc21)CCN3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.