O=C(OCc1ccccc1)N(CCCCN(CCCNC(=O)C(F)(F)F)C(=O)OCc1ccccc1)CCCNC(=O)C(F)(F)F
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?