Title: Cichoriin
CAS Registry Number: 531-58-8
CAS Name: 7-(b-D-Glucopyranosyloxy)-6-hydroxy-2H-1-benzopyran-2-one
Additional Names: 6,7-dihydroxycoumarin-7-glucoside
Molecular Formula: C15H16O9
Molecular Weight: 340.28
Percent Composition: C 52.94%, H 4.74%, O 42.32%
Literature References: Isomeric with esculin. In flowers of the chicory plant (Cichorium intybus L., Compositae). Extraction procedure: Merz, Arch. Pharm. 270, 476 (1932). Synthesis: Head, Robertson, J. Chem. Soc. 1939, 1266; also Merz, loc. cit. Review: Sethna, Shah, Chem. Rev. 36, 1 (1945).
Properties: Needles with 2H2O, mp 213-215° (after drying in desiccator). [a]D18 -105° (c = 3 in 50% dioxane). Sol in hot water, alc, glacial acetic acid. Insol in ether, petr ether. Sol in dil alkalies with yellow color, but no fluorescence (difference from esculin). Absorption spectrum of soln: Merz, loc. cit.
Melting point: mp 213-215° (after drying in desiccator)
Optical Rotation: [a]D18 -105° (c = 3 in 50% dioxane)

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