The lignans are a large group of polyphenols found in plants. Some examples of lignans are enterolignans, enterodiol and enterolactone.
From lign- (Latin, 'wood') + -an (chemical suffix).
Plant lignans are polyphenolic substances derived from phenylalanine via dimerization of substituted cinnamic alcohols (see cinnamic acid), known as monolignols, to a dibenzylbutane skeleton 2. This reaction is catalysed by oxidative enzymes and is often controlled by dirigent proteins.
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