IUPAC Name: 2-Amino-5-(ethylamino)-5-oxopentanoic acid 
Synonyms: L-glutamine, N-ethyl- ; N-ethyl-L-glutamine ; (2S)-2-Amino-5-(ethylamino)-5-oxopentanoic acid ; L-Theanine ; N(5)-ethyl-L-glutamine ; N5-Ethyl-L-glutamine 
Product Categories: Amino ACIDS SERIES;Amino Acids 13C, 2H, 15N;Amino Acids;Biochemistry;non-Proteinorganic Amino Acids;Nutritional Supplements;Functional Products;Amino Acids & Derivatives;Chiral Reagents 
Molecular Structure of L-Theanine (CAS NO.3081-61-6): 
Molecular Formula of L-Theanine (CAS NO.3081-61-6): C₇H₁₄N₂O₃ 
Molecular Weight of L-Theanine (CAS NO.3081-61-6): 174.20 
CAS NO: 3081-61-6 
EINECS : 221-379-0 
Mol File: 3081-61-6.mol 
Index of Refraction: 1.492 
Surface Tension: 48.2 dyne/cm 
Density: 1.171 g/cm³ 
Flash Point: 214 °C 
Enthalpy of Vaporization: 75.19 kJ/mol 
Boiling Point: 430.2 °C at 760 mmHg 
Vapour Pressure: 1.32E-08 mmHg at 25°C 
Melting point: 207°C 
Refractive index : 8 ° (C=5, H₂O) 
Storage temp: Store at 0-5°C 
Appearance:White Crystalline Solid

 L-Theanine (CAS NO.3081-61-6) is a non-protein amino acid mainly found naturally in the green tea plant. It may have activity in modulating the metabolism of cancer chemotherapeutics agents

Heat L-glutamic acid under high pressure , producing Pyrrolidone carboxylic acid. making into nantokite and then add Anhydrous ethylamine, and then heated under high pressure,obtaining L-Theanine (CAS NO.3081-61-6) .

Hazard Codes Xi 
Risk Statements 43
R43:May cause sensitization by skin contact. 
Safety Statements 28-36/37
S28:After contact with skin, wash immediately with plenty of soap-suds. 
S36/37:Wear suitable protective clothing and gloves.