CC(=O)Oc1ccc(C(=O)Nc2cc(NC(=O)c3ccc(OC(C)=O)cc3)cc(C(=O)NC(C)(C)C)c2)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?