COC(C)(C)[C@@H](O)[C@H]1C[C@H](C)[C@@]2(CC[C@]3(C)[C@@H]2CC[C@@H]2[C@@]4(C)CC[C@@H](OC(C)=O)C(C)(C)[C@@H]4C[C@@H](OC4OC(COC(C)=O)C(O)C(O)C4O)[C@]23C)O1
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?