Title: Saponarin
CAS Registry Number: 20310-89-8
CAS Name: 6-b-D-Glucopyranosyl-7-(b-D-glucopyranosyloxy)-5-hydroxy-2-(4-hydroxyphenyl)-4H-1-benzopyran-4-one
Molecular Formula: C27H30O15
Molecular Weight: 594.52
Percent Composition: C 54.55%, H 5.09%, O 40.37%
Literature References: From leaves of Saponaria officinalis L., Caryophyllaceae: Barger, J. Chem. Soc. 89, 1210 (1906); from Hibiscus syriacus L., Malvaceae: Nakoaki, J. Pharm. Soc. Jpn. 64, 304 (1944), C.A. 46, 108d (1952); from Lemna (Spirodela) oligorrhiza Kurz., Lemnaceae: Jurd et al., Arch. Biochem. Biophys. 67, 284 (1957). Structure: Seikel, Geissman, ibid. 71, 17 (1957). Revised structure: Hörhammer et al., Tetrahedron Lett. 1965, 1707. On acidic hydrolysis yields the aglycone, saponaretin.
Derivative Type: Monohydrate
Properties: Pale yellow granules, mp 228°. [a]D -7.9° (aq pyridine). uv max (ethanol): 335, 272 nm. Practically insol in cold water. Sparingly sol in hot water, alcohol; sol in alkalies with yellow color and in concd H2SO4 with blue fluorescence; sol in pyridine.
Melting point: mp 228°
Optical Rotation: [a]D -7.9° (aq pyridine)
Absorption maximum: uv max (ethanol): 335, 272 nm
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