Using Cc1cnc(Nc2cnn(C)c2)nc1NC1CCC2(CC1)CCN(C(=O)OC(C)(C)C)C2 to produce Cc1cnc(Nc2cnn(C)c2)nc1NC1CCC2(CCNC2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.