Title: Gratioside
CAS Registry Number: 53762-90-6
Molecular Formula: C42H68O14
Molecular Weight: 796.98
Percent Composition: C 63.30%, H 8.60%, O 28.11%
Literature References: Triterpene glycoside monohydrate from tubers of Gratiola officinalis L., Scrophulariaceae: Retzlaff, Arch. Pharm. 240, 561 (1902); Tschesche et al., Ann. 674, 196 (1964). Dec on hydrolysis into 1 mol gratiogenin and 2 mol glucose: Tschesche, Heesch, Ber. 85, 1067 (1952).
Derivative Type: Monohydrate
Properties: Clusters of crystals from ethanol, mp 268-274°; [a]D20 +75° (c = 0.825 in alc). Also reported mp 286-289°; [a]D21 +81° (c = 0.83 in ethanol), (Tschesche, 1964). uv max (methanol): 295 nm (log e 1.84). Slightly sol in water, freely in alcohol. Practically insol in ether.
Melting point: mp 268-274°; mp 286-289°
Optical Rotation: [a]D20 +75° (c = 0.825 in alc); [a]D21 +81° (c = 0.83 in ethanol)
Absorption maximum: uv max (methanol): 295 nm (log e 1.84)
Status: This monograph has been retired and is no longer subject to revision or update. |