CC1=CC(C)(C)N2C(=O)C3(C(C#N)=C(N)OC4=C3C(=O)CC(C)(C)C4)c3c(C)c(C)cc1c32
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?