Using O=S1(=O)CCNCC1, Cc1onc(-c2cccc(Cl)c2)c1COc1ccc(C(=O)O)cn1 to produce Cc1onc(-c2cccc(Cl)c2)c1COc1ccc(C(=O)N2CCS(=O)(=O)CC2)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.