CC(C)C(=O)OCC1OC(n2c(Br)nc3c(=O)[nH]c(N)nc32)C(OC(=O)C(C)C)C1OC(=O)C(C)C
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?