CCN1C(=O)[C@H]2[C@@H](C1=O)[C@@H](c1ccc(OC)cc1)N1C(=O)CN(CCOC)C(=O)[C@@]21Cc1ccccc1
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?