COC(=O)C1=C(C)N(Cc2ccccc2)[C@]23O[C@](C(=O)OC)(C(=O)N2C1c1ccccc1)C1CCOC(=O)C13
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?