C[C@@H]1CCC2[C@](C)(CC[C@H](O)[C@@]2(C)CO)[C@@]12CC[C@@](CO)(CC(=O)[O-])O2.[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?