CCOC(=O)[C@H]1[C@H]2COc3ccc(Br)cc3[C@@H]2N2C(=O)c3cc(OC)c(OC)cc3NC(=O)[C@@]12C
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?