ADMVIP(LA)D6 is derived from L-Ornithine-d6 Hydrochloride (O695553), which is labelled L-Ornithine. A non-essential amino acid for human development but is required intermediate in arginine biosynthesis. L-Ornithine is found in virtually all vertebrate tissues as well as incorporated into proteins, such as tyrocidine. Isolation from chicken excreta.