L-theanine

L-theanine, also named N-ethyl-glutamine, with CAS number of 3081-61-6 and formula of C7H14N2O3, is a amide compound in white or off-white powder with melting point of 214-215℃, is easily dissolved in water, and has an incense of burned sugar and a taste of monosodium glutamate.

L-theanine in nature only exists in tea plants accounting of 1%～2% of dry tea in free state, and is the main amino acid in tea accounting of some 50% of free amino acids. L-theanine is essential to human body,