L-tryptophan, also known as alpha-aminindolepropionic acid, molecular formula :C11H12N2O2, white to yellowish white crystal or crystalline powder.Odourless or slightly smelly, tinted by prolonged light.And acid in the dark heating more stable.It is easily broken down when coexisting with other amino acids, sugars and aldehydes.Used as food fortifier and antioxidant.Also used in medicine and other aspects.From the synthesis of indolealdehyde.It can …