Cc1ccc(C(c2c(O)c3ccccc3n(-c3ccccc3)c2=O)c2c(O)c3ccccc3n(-c3ccccc3)c2=O)cc1
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?