Using Cc1nc(CN2CCN(C(=O)OC(C)(C)C)CC2(C)C)c2cc(C3CCC(C)(C)CC3)sc2n1 to produce Cc1nc(CN2CCNCC2(C)C)c2cc(C3CCC(C)(C)CC3)sc2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.