CC(C)C[C@H](NC(=O)N1CC(=O)Nc2ccccc21)C(=O)N[C@@H](Cc1c[nH]c2ccccc12)C(=O)O
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?