Medical Definition of Tocotrienol

1. A tocol with three double bonds in the side chain, i.e., with three additional double bonds in the phytyl chain, thus a 6-(3',7',11',15'-tetramethyl-2',6',10',14'-hexadecatetraenyl)-1,4-hydroquinone or a 2-methyl-2-(4,8,12-trimethyltrideca-3,7,11-trienyl)chroman-6-ol. The natural products carry methyls at one or more of positions 5, 7, and 8 of the chromanol and are thus identical, except for the unsaturation in the phytyl-like side chain, to the tocopherols; also analogous is the cyclization to form a chromanol derivative and oxidation to form the tocotrienolquinones (or chromenols). Abbreviated T-n (hydroquinone form) or TQ-n (quinone form) and preceded by alpha-, beta-, etc., as in the tocopherols, to indicate degree of methylation (the n indicates the number of intact isoprene or prenyl units remaining in the chromanol or chromenol form). Tocotrienol terminology is used to indicate relationships to tocols and tocoenols (vitamin E-like), the chromanol terminology to indicate relationship to the isoprenoidal compounds of the vitamin K and coenzyme Q series. (05 Mar 2000)



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Lexicographical Neighbors of Tocotrienol

tocolytic agents
tocolytics
tocometer
tocopherol
tocopherol cyclase
tocopherolquinone
tocopherols
tocopheryl
tocopherylquinone
tocopheryls
tocophobia
tocoquinone
tocororo
tocororos
tocos
tocotrienol (current term)
tocotrienolquinone
tocs
tocsin
tocsins
tocus
tod
todah rabah
todash
today
today's
today is a good day to die
today we are all
todaye
todays

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