Using Cc1nc(C)c(CNC2CCN(C(=O)OC(C)(C)C)CC2)s1, O=CC1CC1 to produce Cc1nc(C)c(C(CC2CC2)NC2CCN(C(=O)OC(C)(C)C)CC2)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.