Using CCCCOC(=O)[C@H](Cc1ccc(O)cc1)NC(=O)C1(NC(=O)C2(S)CCCC2)CCCC1 to produce O=C(O)[C@H](Cc1ccc(O)cc1)NC(=O)C1(NC(=O)C2(S)CCCC2)CCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.