
Glycoalkaloids are a family of chemical compounds derived from alkaloids in which sugar groups are appended. There are several that are potentially toxic, most notably those which are the poisons commonly found in the plant species Solanum dulcamara (nightshade). A prototypical glycoalkaloid is solanine (composed of the sugar solanose and the alka...
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http://en.wikipedia.org/wiki/Glycoalkaloid

A bitter-tasting compound present in potato foliage and in the epidermis of potato tubers.
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https://extension.umd.edu/hgic/resource-library/vegetable-gardening-glossar
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