CC(=O)OCC1OC(N2C(C)=C(C(C)=O)C(c3ccc(Cl)cc3)C(C#N)=C2S)C(OC(C)=O)C(OC(C)=O)C1OC(C)=O
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?