3081-61-6

3081-61-6 structure

Name: L-Theanine
Chemical Name: N5-ethyl-L-glutamine
CAS Number: 3081-61-6
Molecular Formula: C₇H₁₄N₂O₃
Molecular Weight: 174.198
Catalog: Biochemical Common amino acids and protein drugs
Create Date: 2018-02-04 08:00:00
Modify Date: 2025-08-20 09:50:30
L-Theanine (L-Glutamic Acid γ-ethyl amide）is a non-protein amino acid contained in green tea leaves, which blocks the binding of L-glutamic acid to glutamate receptors in the brain, and with neuroprotective and anti-oxidative activities. L-Theanine causes anti-stress effects via the inhibition of cortical neuron excitation by oral intake[1][2][3].

Name	N5-ethyl-L-glutamine
Synonyms	L-Theanine THEANINE,L (5Z)-5-(Ethylimino)-5-hydroxy-L-norvaline Nγ-Ethyl-L-glutamine N5-ethylglutamine L-Glutamic acid γ-(ethylamide) N(5)-ethyl-L-glutamine zwitterion Theanine (2S)-2-amino-4-(ethylcarbamoyl)butanoic acid N-γ-ethyl-L-glutamine L-TheaMine L-Glutamine, N-ethyl- SUNTHEANINE EINECS 221-379-0 MFCD00059653 L-Norvaline, 5-(ethylimino)-5-hydroxy-, (5Z)- N5-Ethyl-L-glutamine (S)-2-Amino-5-(ethylamino)-5-oxopentanoic acid N'-Ethyl-L-glutamine N(5)-ethyl-L-glutamine N-Ethyl-L-glutamine L-γ-Glutamylethylamide

Description	L-Theanine (L-Glutamic Acid γ-ethyl amide）is a non-protein amino acid contained in green tea leaves, which blocks the binding of L-glutamic acid to glutamate receptors in the brain, and with neuroprotective and anti-oxidative activities. L-Theanine causes anti-stress effects via the inhibition of cortical neuron excitation by oral intake[1][2][3].
Related Catalog	Signaling Pathways >> Others >> Others Research Areas >> Neurological Disease
References	[1]. Vuong QV, et al. L-Theanine: properties, synthesis and isolation from tea. J Sci Food Agric. 2011 Aug 30;91(11):1931-9. [2]. Kimura K, et al. L-Theanine reduces psychological and physiological stress responses. Biol Psychol. 2007 Jan;74(1):39-45. [3]. Takeshima M, et al. l-Theanine protects against excess dopamine-induced neurotoxicity in the presence of astrocytes. J Clin Biochem Nutr. 2016 Sep;59(2):93-99.

Symbol	GHS07
Signal Word	Warning
Hazard Statements	H317
Precautionary Statements	P280
Hazard Codes	Xi:Irritant
Risk Phrases	R43
Safety Phrases	S28-S36/37
RIDADR	NONH for all modes of transport
HS Code	2924199090

HS Code	2924199090
Summary	2924199090. other acyclic amides (including acyclic carbamates) and their derivatives; salts thereof. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%