Cc1ccc([N+](=O)[O-])cc1S(=O)(=O)Nc1ccc(C2=NN(C(=O)c3ccccc3)C(c3cccs3)C2)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?