What is a variety of sugar, isomeric with sucrose, found in the tubers of the Jerusalem artichoke (Helianthus tuberosus), in the dahlia, and other Compositæ called?

synanthrose — A variety of sugar, isomeric with sucrose, found in the tubers of the Jerusalem artichoke (Helianthus tuberosus), in the dahlia, and other Compositæ. (Webster's 1913.)

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