CC(=O)OC1COC(n2c(=S)n(-c3ccccc3)c(=O)c3cc(Br)ccc32)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?