Abstract: A novel glycoside, 4.sup.G -alpha-D-glucopyranosyl rutin, is formed by a saccharide-transferring enzyme and glucoamylase in a solution which contains rutin together with glucoamylase. The 4.sup.G -alpha-D-glucopyranosyl rutin formed in such a solution is purified with a synthetic macroreticular resin, and crystallization in an organic solvent yields a complex crystal with the organic solvent. 4.sup.G -Alpha-D-glucopyranosyl rutin exhibits the same molecular absorption coefficient as intact rutin, and is readily water-soluble, substantially tasteless and odorless, and readily hydrolyzable in vivo to exhibit physiological activities inherent to rutin. These render 4.sup.G -alpha-D-glucopyranosyl rutin very useful as a highly-safe, natural yellow coloring agent, antioxidant, stabilizer, quality-improving agent, preventive, remedy, uv-absorbent and deterioration-preventing agent in foods, beverages, tobaccos, cigarets, feeds, pet foods, pharmaceuticals, cosmetics and plastics.

Abstract: Disclosed are hitherto-unknown erlose hydrate, a mixture solid containing the same, and their production and uses. One mole of the erlose hydrate has 1 or 3 moles of cystallization water. The erlose hydrate and a mixture solid containing the same are readily dissolvable in water, non- or scarcely-hygroscopic, low-cariogenic, low-calorific, and, therefore, favorably usable to prepare orally-usable products, e.g. foodstuffs in general, cosmetics, dentifrices, pharmaceuticals, and chemicals.