CC[C@H](C)[C@@H](C(=O)N1CCCC1c1nccs1)N(C)C(=O)[C@H](CC(C)C)N(C)C(=O)[C@H](Cc1ccc(OC)cc1)N(C)C(=O)/C=C(\C)OC
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?