COC(=O)[C@@H](Cc1ccccc1)NC(=O)CC[C@H]1O[C@@H](n2cc(C)c(=O)[nH]c2=O)C[C@@H]1O
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?