Asperuloside
Title: Asperuloside
CAS Registry Number: 14259-45-1
CAS Name: [2aS-(2aa,4aa,5a,7ba)]-4-[(Acetyloxy)methyl]-5-(b-D-glucopyranosyloxy)-2a,4a,5,7b-tetrahydro-1H-2,6-dioxacyclopent[cd]inden-1-one
Additional Names: rubichloric acid
Molecular Formula: C18H22O11
Molecular Weight: 414.36
Percent Composition: C 52.18%, H 5.35%, O 42.47%
Literature References: From herb of Asperula odorata L., Galium aparine L., Rubiaceae. Occurs also in Coprosma spp. Isoln: Hérissey, Compt. Rend. 180, 1695 (1925); Briggs, Nicholls, J. Chem. Soc. 1954, 3940. Structure: Grimshaw, Chem. Ind. (London) 1961, 403; Briggs et al., J. Chem. Soc. 1965, 2595.
Properties: Needles from alcohol or acetone, mp 131-132°. [a]D25 -198.6° (c = 1.44 in water). Absorption spectra: Briggs, Cain, J. Chem. Soc. 1954, 4182. Sol in water, methanol, ethanol, acetone, ethylacetate, dioxane, pyridine, acetic acid. Practically insol in ether, benzene, chloroform, ligroin.
Melting point: mp 131-132°
Optical Rotation: [a]D25 -198.6° (c = 1.44 in water)

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