ClC(Cl)(Cl)C1=N[C@H]2[C@H](Br)[C@@H]3O[C@@H](c4ccccc4)[C@H](c4ccccc4)O[C@@H]3[C@H]2O1
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?