COc1ccc2nc3cc(Cl)ccc3c(NCCCN(Cc3cc(OC)c(OC)c(OC)c3)Cc3cc(OC)c(OC)c(OC)c3)c2c1
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?