CC(=O)[C@H]1CC[C@H]2[C@@H]3CC=C4C[C@@H](OS(=O)(=O)[O-])CC[C@]4(C)[C@H]3CC[C@]12C.[Na+]
Heavy atom refers to any atom that is not hydrogen. The heavy atoms in molecules are carbon, oxygen, nitrogen, and sulfur. How many heavy atoms are in the molecule?