Using O=C(O)C(F)(F)F, Cc1nc(-c2cn3c(n2)-c2cc(S(=O)C4CCN(C(C)C)CC4)ccc2OCC3)n(C(C)C)n1 to produce Cc1nc(-c2cn3c(n2)-c2cc(S(=O)(=O)C4CCN(C(C)C)CC4)ccc2OCC3)n(C(C)C)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.