CC(=O)Oc1ccc(C(=O)[C@H]2[C@H]3C(=O)N(c4ccccc4)C(=O)[C@H]3[C@@H]3C=CC=NN32)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?