a new metabolite of vitamin k , 2 ( 3 ) -hydroxy-2,3-dihydro-2-methyl,3-phytyl-1,4-naphthoquinone ( hydroxyvitamin k ) , has been identified as a product of vitamin k epoxide metabolism in hepatic microsomes from warfarin-resistant rats , but not in those derived from normal rats .
C0027388
naphthoquinone
C0042878
product