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

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.