Using CC(C)(C)OC(=O)NCC(=O)O, COCCNC(N)=Nc1nc(-c2cccc(CN)c2)cs1 to produce COCCNC(N)=Nc1nc(-c2cccc(CNC(=O)CNC(=O)OC(C)(C)C)c2)cs1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.