Using CC1C(=O)NN=C2COc3cc(C4CC4)c(N)cc3N21, CC(C)(C)OC(=O)N1CC(=O)C1 to produce CC1C(=O)NN=C2COc3cc(C4CC4)c(NC4CN(C(=O)OC(C)(C)C)C4)cc3N21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.