CC(C)(C)CC(C)(C)NC1=Nc2cc(Cl)c(Cl)cc2N[C@@]12C[C@@H]1CCN3C(=O)CCC[C@H](C2)[C@H]13
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?