COC(=O)[C@@H](NC1(c2ccccc2)c2ccccc2-c2ccccc21)[C@H](OC(=O)[C@H]1CCCN1S(=O)(=O)c1ccccc1)C(=O)OC
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?