COC(=O)C1(c2ccc(N(C)C)cc2OC)CCCN(C(=O)Oc2ccccc2[N+](=O)[O-])CCc2c1[nH]c1ccccc21
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?