Melatonin English name: melatonin Appearance: yellow white crystal Melamine, melanin, pinealin CAS No. 73-31-4 Chemical Name N-Acetyl-5-methoxytryptamine Molecular formula C13N2H16O2 Molecular weight 232.27 Melting point 116 ° C ~ 118 ° C Uses: delay aging; fight cancer; improve sleep; regulate immunity