Stoffwechsel‐Endprodukte von PhyllochinonMenachinon‐4, Ubichinon‐9 und Hexahydroplastochinon‐4 (Phytylplastochinon)

Abstract
Phylloquinone, menaquinone‐4, ubiquinone‐9 and hexahydroplastoquinone‐4,i.e.compounds with isoprenoid side‐chains which differ by their length and degrees of unsaturation, are degraded in the rat in the same way as tocopherols. After oxidative shortening of the side‐chain to seven C‐atoms, the metabolites are excreted in the urine as conjugates, presumably glucuronides, which, after hydrolysis, can be isolated as γ‐lactones.