Cc1cc2c3c(c1C)C1(C(=O)N3C(C)(C)CC2C)C(C#N)=C(N)OC2=C1C(=O)CC(C)(C)C2
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?