CNC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)C(Cc1ccc(OCc2ccccc2)cc1)NC(=O)C(COCc1ccccc1)NC(=O)OC(C)(C)C
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?