Using CC(C)n1cnc2c(Nc3cnn(C)c3)nc(C3=CCCN(C(=O)OC(C)(C)C)C3)nc21 to produce CC(C)n1cnc2c(Nc3cnn(C)c3)nc(C3CCCN(C(=O)OC(C)(C)C)C3)nc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.