O=C(Oc1cc(OC(=O)c2ccccc2)c2c(c1)OC(c1ccc(OC(=O)c3ccccc3)c(OC(=O)c3ccccc3)c1)[C@@H](OC(=O)c1ccccc1)C2)c1ccccc1
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?