CCC1=C(OC(=O)N(CC)CC)N2C(=O)O/C(=N\CCc3c[nH]c4ccccc34)[C@]2(Cc2ccccc2)[C@H]2C1=CC[C@H]1C(=O)N(c3ccccc3)C(=O)[C@H]12
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?