C[C@@H](NC(=O)[C@@H]1C[C@]1(C)COC(=O)c1cc([N+](=O)[O-])cc([N+](=O)[O-])c1)c1cccc2ccccc12
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?