| 摘要 |
NEW MATERIAL:A compound of formula I (R1 is malonic acid, p-coumaric acid, sinapic acid, ferulic acid, 4-O-beta-D-glucosyl-p-coumaric acid or 4-O-beta-D- glucosylferulic acid; R2 is H, p-coumaric acid, sinapic acid or ferulic acid). EXAMPLE:3-0-[2-0-{6-0-( 4-0-beta-glucopyranosyl-p-coumaryl )-beta-D-glucopyranosyl}-beta- D-glucopyranosyl]-5-0-(beta-D-glucopyranosyl)cyanidin(I). USE:Colorant for foods, drugs, cosmetics, etc. PREPARATION:Leaf of red cabbage is frozen with liquid nitrogen, crushed with a mixer, dissolved in a methanol solution containing hydrochloric acid, etc., at normal temperature, filtered and purified by chromatography to obtain the objective compound. |
