Using CCCCCCCCCCCCCCCCCC(=O)NCO, NC(=O)CCSc1ccc(O)cc1 to produce CCCCCCCCCCCCCCCCCC(=O)NCNC(=O)CCSc1ccc(O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.