Using NC1CC1, COc1c(C)cnc(Cn2nc3c4c(nc(N)nc42)SC(C(=O)O)C3)c1C to produce COc1c(C)cnc(Cn2nc3c4c(nc(N)nc42)SC(C(=O)NC2CC2)C3)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.