Using CC1(CN2C(=O)c3ccccc3C2=O)NC(=O)c2ccc(Nc3ccncn3)c(=O)n21 to produce CC1(CN)NC(=O)c2ccc(Nc3ccncn3)c(=O)n21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.