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Lactose is a disaccharide derived from the condensation of galactose and glucose.
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![[(2R,3S,4S,5R,6S)-3,4,5-triacetyloxy-6-[(2R,3R,4S,5R,6R)-4,5-diacetyloxy-2-(acetyloxymethyl)-6-bromooxan-3-yl]oxyoxan-2-yl]methyl acetate](https://images.chemenu.com/attachments/products_new/svg/4753-07-5.svg)