Using O=C(O)CCCCC(=O)O, CCCCC1(CC)CS(=O)(=O)c2ccc(N(C)C)cc2C(c2cccc(N)c2)C1O to produce CCCCC1(CC)CS(=O)(=O)c2ccc(N(C)C)cc2C(c2cccc(NC(=O)CCCCC(=O)O)c2)C1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.