CN1c2ccccc2C2=C(c3ccccc3)CC[C@@H](C(=O)N3C4C[C@H]5CC[C@@]4(CS3(=O)=O)C5(C)C)[C@@H]21
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?