Cc1c(Cc2ccccc2)c(=O)oc2cc(OC(C)C(=O)NC[C@H]3CC[C@H](C(=O)O)CC3)c(Cl)cc12
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?