C#CCOCCOCCOCCNc1nc(N2CCN(C(=O)[C@H](CCCCN)n3cc(CCCC)nn3)CC2)nc(N2CCN(C(=O)[C@H](C(C)C)n3cc(CCO)nn3)CC2)n1.Cl
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?