CC1(C)[C@H](C(=O)[O-])N2C(=O)[C@@H](NS(=O)(=O)c3ccc([N+](=O)[O-])cc3)[C@H]2S1(=O)=O.[Na+]
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?