CCC1(CC)C(=O)C2=C3C1[C@H](C(=O)OC)CC(C(=O)OC)C[C@H]3n1c(=O)n(-c3ccccc3)c(=O)n1[C@H]2C
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?