O=C1c2ccc3c4ccc5c6c(ccc(c7ccc(c2c37)C(=O)N1CCN1CCCCC1)c64)C(=O)N(CCN1CCCCC1)C5=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?