CC(=O)Oc1ccc(-c2c(OC(C)=O)c(OC(C)=O)c(-c3ccc(OC(C)=O)c(OC(C)=O)c3)c(OC(C)=O)c2OC(C)=O)cc1
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?