Cc1ccc(C)c(N2C(=O)c3ccc(C(=O)OCC(=O)c4c(N)n(C)c(=O)n(C)c4=O)cc3C2=O)c1
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?