O=C(O)/C=C/C(=O)O.O=C(O)/C=C/C(=O)O.O=C(O)/C=C/C(=O)O.O=C1CCCN1CC#CCN1CCCC1.O=C1CCCN1CC#CCN1CCCC1
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?