| phytyl | The radical, -CH2-CH==C(CH3)-CH2-[-CH2-CH2-CH(CH3)-CH2-]-3H, found in phylloquinone (vitamin K1); a tetraprenyl radical, reduced in 3 of the 4 prenyl groups. (05 Mar 2000) |
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| phytyl alcohol | Long chain fatty alcohol (C20) forming part of chlorophyll, attached to the protoporphyrin ring by an ester linkage. (18 Nov 1997) |