C[C@]12CC[C@H]3[C@@H](CCC4=C/C(=N/O)CC[C@@]43C)[C@@H]1CC(=C\c1ccc([N+](=O)[O-])cc1)/C2=N\O
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?