CC1(C)O[C@@H]2[C@@H](COS(=O)(=O)[O-])O[C@@H](n3ccc(=O)[nH]c3=O)[C@@H]2O1.[K+]
Hydrogen bond acceptor: The atom, ion, or molecule component of a hydrogen bond which does not supply the bridging (shared) hydrogen atom. How many hydrogen bond acceptors does the molecule have?