. . . . . . . . . . . . "923-27-3"@en . . . . . . . . . "D-Lysine"@en . . . . . . . . . . "An essential amino acid. It is often added to animal feed. [PubChem]"@en . . "experimental"@en . . . . . . "Masakatsu Furui, Eiji Takahashi, Hiroyasu Seko, \"Process for preparing D-lysine.\" U.S. Patent US5723321, issued June, 1992."@en .