Using CC(C)(C)OC(=O)N1C[C@H](O)C[C@H]1C(=O)O, COc1ccc2c(O)cc(-c3csc(NC(C)C)n3)nc2c1 to produce COc1ccc2c(OC3CC(C(=O)O)N(C(=O)OC(C)(C)C)C3)cc(-c3csc(NC(C)C)n3)nc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.