Names in Current and Previous Nomenclatures
Previous name | Chemical name | Reason for name change |
---|---|---|
Vitamin B4 | Adenine | DNA metabolite; synthesized in body |
Vitamin B8 | Adenylic acid | DNA metabolite; synthesized in body |
Vitamin F | Essential fatty acids | Needed in large quantities (does not fit the definition of a vitamin). |
Vitamin G | Riboflavin | Reclassified as Vitamin B2 |
Vitamin H | Biotin | Reclassified as Vitamin B7 |
Vitamin J | Catechol, Flavin | Catechol nonessential; flavin reclassified as B2 |
Vitamin L1 | Anthranilic acid | Non essential |
Vitamin L2 | Adenylthiomethylpentose | RNA metabolite; synthesized in body |
Vitamin M | Folic acid | Reclassified as Vitamin B9 |
Vitamin O | Carnitine | Synthesized in body |
Vitamin P | Flavonoids | No longer classified as a vitamin |
Vitamin PP | Niacin | Reclassified as Vitamin B3 |
Vitamin S | Salicylic acid | Proposed inclusion of salicylate as an essential micronutrient |
Vitamin U | S-Methylmethionine | Protein metabolite; synthesized in body |
The reason that the set of vitamins skips directly from E to K is that the vitamins corresponding to letters F-J were either reclassified over time, discarded as false leads, or renamed because of their relationship to vitamin B, which became a complex of vitamins.
The German-speaking scientists who isolated and described vitamin K (in addition to naming it as such) did so because the vitamin is intimately involved in the Koagulation of blood following wounding. At the time, most (but not all) of the letters from F through to J were already designated, so the use of the letter K was considered quite reasonable. The table on the right lists chemicals that had previously been classified as vitamins, as well as the earlier names of vitamins that later became part of the B-complex.
Read more about this topic: Vitamin
Famous quotes containing the words names, current and/or previous:
“No, no! I dont, I dont want to know your name. You dont have a name, and I dont have a name, either. No names here. Not one name.”
—Bernardo Bertolucci (b. 1940)
“Men perceive that equating love and domestic work is a trap. They fear that to get involved with housework would send them hurtling into the bottomless pit of self-sacrifice that is womens current caring roles.”
—Debbie Taylor (20th century)
“I will frankly declare, that after passing a few weeks in this valley of the Marquesas, I formed a higher estimate of human nature than I had ever before entertained. But alas! since then I have been one of the crew of a man-of-war, and the pent-up wickedness of five hundred men has nearly overturned all my previous theories.”
—Herman Melville (18191891)