COC(=O)/C=C(\S/C(=C(/c1ccccc1)n1cc(C(=O)OC)c(C(=O)OC)n1)c1ccccc1)C(=O)OC
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?