CC1(C)C(=O)/C=C\C(=O)C(C)(C)C(=O)/C=C\C(=O)C(C)(C)C(=O)/C=C\C(=O)C(C)(C)C(=O)/C=C\C1=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?