CC(=O)OC1C[C@@]2(C)C(c3ccoc3)OC(=O)C3O[C@@]32[C@]2(C)C(OC(C)=O)CC3C(C)(C)C(OC(C)=O)CC(OC(C)=O)[C@@]3(C)C12
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?