C[C@H]1COC(=O)[C@H](CC(=O)OC(C)(C)C)C/C=C\C[C@H](CC(=O)N(CCO)Cc2ccccc2)C(=O)N1
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?