Using Nc1cnn(CCOS(=O)(=O)O)c1N, CC(C)(C)OC(=O)NCC[C@H](O)C(=O)O to produce CC(C)(C)OC(=O)NCC[C@H](O)C(=O)Nc1cnn(CCO)c1N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.