COc1ccc(C2CC(=O)c3cc(-c4nc(-c5cccc([N+](=O)[O-])c5)cs4)c(=O)n(-c4cccc(C)c4)c3C2)cc1
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?