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a colorless, crystalline, water-soluble, sweet-tasting alkaloid, C 5 H 11 NO 2 , usually obtained from sugar beets or synthesized from glycine, used chiefly in medicine.
Historical Examples

It is a product of the decomposition of choline, betaine, and neuridine, when these substances are distilled with potash.
Poisons: Their Effects and Detection Alexander Wynter Blyth

A hydrochlorate, a sulphate, an aurochloride, and a platinic chloride of betaine have been prepared.
Cooley’s Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades…, Sixth Edition, Volume I Arnold Cooley

betaine and choline often occur together in the germs of many plants.
The Chemistry of Plant Life Roscoe Wilfred Thatcher

a sweet-tasting alkaloid that occurs in the sugar beet and other plants and in animals. Formula: C5H11NO2
(pl) a group of chemical compounds that resemble betaine and are slightly basic zwitterions

betaine be·ta·ine (bē’tə-ēn’, -ĭn)
A sweet crystalline alkaloid occurring in sugar beets and other plants and used in the treatment of muscular degeneration.
(bē’tə-ēn’, -ĭn)

Any of a class of organic salts that are derived from amino acids and have a cationic (positively charged) component that consists of a nitrogen atom attached to three methyl (CH3) groups.

A salt of this class that is a sweet crystalline alkaloid first found in sugar beets but also widely occurring in other plants and in animals. Betaine is used in the treatment of muscular weakness and degeneration. Chemical formula: C5H11NO2.


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