COC(=O)Cc1c([C@H]2[C@H](CC(=O)OC)c3ccccc3N2S(=O)(=O)c2ccc(C)cc2)[nH]c2ccccc12
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?