O=c1n(Cc2cc3c(cc2Cl)OCO3)c(=O)n2n1CC[C@H]1/C(=N\OC[C@@H](O)COCc3ccco3)[C@H]3O[C@@H]3[C@@H](O)[C@@H]12
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?