Using CC(C)(C)OC(=O)N[C@@H](Cc1ccc(O)cc1)C(=O)O, CCOS(=O)(=O)OCC to produce CCOc1ccc(C[C@H](NC(=O)OC(C)(C)C)C(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.