Suprasterol II
Title: Suprasterol II
CAS Registry Number: 562-71-0
CAS Name: (2a,7a,8R,19a,22E)-7,19:8,19-Dicyclo-9,10-secoergosta-5(10),22-dien-2-ol
Molecular Formula: C28H44O
Molecular Weight: 396.65
Percent Composition: C 84.78%, H 11.18%, O 4.03%
Literature References: Ultraviolet irradiation product of vitamin D2. Isoln: Windaus et al., Ann. 483, 17 (1930). Structure and stereochemistry: Dauben, Baumann, Tetrahedron Lett. 1961, 565. Crystal structure: C. P. Saunderson et al., ibid. 573. Improved isoln and spectral data: T. Kobayashi et al., J. Nutr. Sci. Vitaminol. 23, 291 (1977).
Properties: Rough prisms from acetone or methanol, mp 110°. bp0.005 190°. [a]D19 +62.9° (methanol); [a]D22 +47.8° (methanol). Sol in all organic solvents.
Melting point: mp 110°
Boiling point: bp0.005 190°
Optical Rotation: [a]D19 +62.9° (methanol); [a]D22 +47.8° (methanol)

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