O=C(NC(CO)Cc1ccc(Oc2cc(CC(CO)NC(=O)OCc3ccccc3)ccc2OC(=O)OCc2ccccc2)cc1)OCc1ccccc1
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?