O=P1(NCCCn2cc[n+](Cc3nc4ccccc4[nH]3)c2)C=C(c2ccccc2)OC(c2ccccc2)=C1.[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?