... 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 ... classified as α, β, δ, and θ waves in accordance with its frequency, and each wave is connected to a ... Conference 1998 held in Gemerny. In accordance with survey conducted by authority, L-theanine was ...