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  1. Melatonin | C13H16N2O2 | CID 896 - PubChem

  2. Melatonin - Wikipedia

  3. Melatonin Structure - C13H16N2O2 - Over 100 million chemical

  4. Chemical structure of melatonin. | Download Scientific Diagram

  5. Chemical Structure of Melatonin | Download Scientific Diagram

  6. Chemical structure of melatonin | Download Scientific Diagram

  7. Chemical Structure and Physical Properties of Melatonin

  8. The Melatonin Molecule - 3D - Jsmol - World of Molecules

  9. Melatonin | C13H16N2O2 - ChemSpider

  10. Melatonin - NIST Chemistry WebBook