COc1ccc(C(=O)COC(=O)CCN2C(=O)[C@@H]3[C@@H]4C[C@@H](C(Br)C4Br)[C@@H]3C2=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?