O=C(O[C@H](/C=C/c1ccccc1)P1(=O)N(Cc2ccccc2)[C@@H]2CCCC[C@H]2N1Cc1ccccc1)c1ccccc1
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?