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A non-proteinogenic L-alpha-amino acid that is L-alanine in which one of the methyl hydrogens is replaced by a methylamino group. A non-proteinogenic amino acid produced by cyanobacteria, it is a neurotoxin that has been postulated as a possible cause of neurodegenerative disorders of aging such as Alzheimer's disease, amyotrophic lateral sclerosis, and the amyotrophic lateral sclerosis/parkinsonism-dementia complex (ALS-PDC) syndrome of Guam." []

L-3-Amino-isobutanoic acid is a component of branched-chain amino acid biosynthesis and metabolism. It can also be used in pyrimidine metabolism. L-3-Amino-isobutanoic acid is produced from S-methylmalonate semialdehyde by the enzyme 4-aminobutyrate aminotransferase.

2,4-Diaminobutyric acid, also known as 2,4-diaminobutanoate or Dbu, belongs to the class of organic compounds known as alpha amino acids. These are amino acids in which the amino group is attached to the carbon atom immediately adjacent to the carboxylate group (alpha carbon). 2,4-Diaminobutyric acid is a very hydrophobic molecule, practically insoluble in water, and relatively neutral. 2,4-Diaminobutyric acid exists in all living organisms, ranging from bacteria to humans. Outside of the human body, 2,4-Diaminobutyric acid has been detected, but not quantified in cow milk. This could make 2,4-diaminobutyric acid a potential biomarker for the consumption of these foods. 2,4-Diaminobutyric acid is a non-physiological, cationic amino acid analogue that is transported into cells by System A with potent antitumoral activity in vitro against human glioma cells, the result of the pronounced concentrated uptake of DAB in glioma cells to the extent that a cellular lysis could occur due to osmotic reasons.

N-ethyl-N-(2-hydroxyethyl)nitrosamine is a nitrosamine that is N-nitrosodiethylamine in which one of the ethyl froups has been replaced by a 2-hydroxyethyl group. It is used to induce renal and liver tumours in rodents. It has a role as a carcinogenic agent. It is a nitrosamine and a primary alcohol. It is functionally related to a N-nitrosodiethylamine.

2-Amino-3-(methylamino)propanoic acid is a natural product found in Cycas circinalis with data available.

A diamino acid that is butyric acid in which a hydrogen at position 2 and a hydrogen at position 4 are replaced by amino groups." []

A 2,4-diaminobutyric acid that has R-configuration." []

N-(2-aminoethyl)-glycine is an alpha-amino acid. N-(2-Aminoethyl)glycine is a natural product found in Cyanobacterium and Synechocystis with data available.

2,3-Diaminobutyric acid is an alpha-amino acid.

A nitrosamine that is N-nitrosodiethylamine in which one of the ethyl froups has been replaced by a 2-hydroxyethyl group. It is used to induce renal and liver tumours in rodents." []