Using O=C(O)[C@H](CS(=O)(=O)Cc1ccccc1)NC(=O)N1CCOCC1, NC1C(O)CCCC1O to produce O=C(NC1C(O)CCCC1O)[C@H](CS(=O)(=O)Cc1ccccc1)NC(=O)N1CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.