Using C=COCC, COC(=O)C[C@@H](C(=O)OCc1ccccc1)N(Cc1ccccc1)C[C@@H](O)COS(=O)(=O)c1ccc(C)cc1 to produce CCOC(C)O[C@@H](COS(=O)(=O)c1ccc(C)cc1)CN(Cc1ccccc1)[C@@H](CC(=O)OC)C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.