Using C#Cc1nc(-c2ccccc2)c(-c2nc3c(N)ncnc3s2)n1C to produce CCc1nc(-c2ccccc2)c(-c2nc3c(N)ncnc3s2)n1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.