COC(=O)c1ccc(C(NC(=O)OCc2ccccc2)/C(C)=C/[C@@H](C)C(=O)NCc2ccc(OC)c(OC)c2)cc1
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?