Using COc1ccc2c(c1)c(-c1cc3c(ncc4cnc(CCCNC(C)=O)n43)n1CO)cn2C to produce COc1ccc2c(c1)c(-c1cc3c(ncc4cnc(CCCNC(C)=O)n43)[nH]1)cn2C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.