O=c1/c(=C/c2ccc([N+](=O)[O-])o2)sc2n1[C@@H](c1ccc(Cl)cc1)C=C(c1cc(F)c(Cl)cc1Cl)N=2
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?