CCCCCCCCCCCCCCCC(=O)OCC1OC(N2C(=O)/C(=N\NC(N)=S)c3ccc([N+](=O)[O-])cc32)C(OC(C)=O)C1OC(C)=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?