CN(CCCNC(=O)c1cn(C)c2c1ccc1cc(Cl)ccc12)CCCNC(=O)c1cn(C)c2c1ccc1cc(Cl)ccc12
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?