COC(=O)CN1C(=O)[C@H]2[C@@H](C)C3=C4[C@@H](CC(C(=O)OC)=C[C@@H](C(=O)OC)[C@H]4[C@@](C)(NC(=O)c4ccccc4)C3=O)[C@H]2C1=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?