COc1cc(C2C(C(=O)Nc3ccc(Cl)c(Cl)c3)=C(C)NC(C)=C2C(=O)Nc2ccc(Cl)c(Cl)c2)ccc1O
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?