CCOC(=O)N1CCN(S(=O)(=O)c2ccc(C(=O)N(CCCN(C)C)c3nc4ccc(OC)cc4s3)cc2)CC1.Cl
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?