COc1cc(-c2cccc([C@H]3[C@@H]4C=CC[C@@H](C)[C@@H]4C(=O)N3Cc3ccccc3)c2)cc(OC)c1OC
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?