COc1ccc(N2C(=O)N3[C@H](c4ccc(Br)cc4)[C@@H]4C(=O)N(C(C)(C)C)C(=O)[C@@H]4[C@]3(Cc3ccccc3)C2=O)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?