
Convallarin is a crystalline glucoside extracted from the Lily of the Valley plant (Convallaria majalis) It may be obtained from the alcoholic extract of the residue from which the convallamarin has been removed with water. The alcoholic solution is treated with lead acetate, the filtrate freed from lead by hydrogen sulfide, and crystallised by co...
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http://en.wikipedia.org/wiki/Convallarin

• (n.) A white, crystalline glucoside, of an irritating taste, extracted from the convallaria or lily of the valley.
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http://thinkexist.com/dictionary/meaning/convallarin/
Con`val·la'rin noun (Chemistry) A white, crystalline glucoside, of an irritating taste, extracted from the convallaria or lily of the valley.
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http://www.encyclo.co.uk/webster/C/152
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