COC(=O)CCC(C)[C@H]1CCC2C3C(C[C@H](OC(C)=O)[C@@]21C)[C@@]1(C)CCC2(C[C@H]1C[C@H]3OC(C)=O)OOC1(CCCCC1)OO2
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?