Notes: L-Albizziin is a non-proteinogenic amino acid and metabolite of 5-aminouracil.{66128} It is formed from 5-aminouracil via a 5-amino-5,6-dihydrouracil intermediate by dihydropyrimidinase.{66128} L-Albizziin inhibits 4-methyleneglutaminase (IC50 = 20 mM for the peanut enzyme).{66129}