Cl.O[C@@]12Cc3c([nH]c4ccccc34)[C@@H]3Oc4c(-c5ccccc5)ccc5c4[C@@]31CCN(CC1CC1)[C@@H]2C5
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?