CC(C)OP(=O)(OC(C)C)C1=NN(c2ccc([N+](=O)[O-])cc2)C(P(=O)(OC(C)C)OC(C)C)=NN1c1ccc([N+](=O)[O-])cc1
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?