O=C1C2Cc3c(n(C(=O)c4ccccc4)c4ccccc34)CC2C(=O)N1c1ccc(Nc2ccc(N3C(=O)C4Cc5c(n(C(=O)c6ccccc6)c6ccccc56)CC4C3=O)cc2)cc1
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?