COC1CC(C)C(OC)C2=CC(=O)C=C(NC(=O)/C(C)=C/C=C\C(C)C(OC(N)=O)/C(C)=C\C(C)C1OC)C2=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?