COC(=O)c1csc([C@@H](OC(=O)[C@H](C)[C@H](CCCC(C)(Cl)Cl)OC(=O)c2csc([C@H](O)CO)n2)C(C)C)n1
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?