Cynanchogenin

Title: Cynanchogenin
CAS Registry Number: 6870-10-6
CAS Name: (3b,12b,14b,17a)-12-[(3,4-Dimethyl-1-oxo-2-pentenyl)oxy]-3,8,14-trihydroxypregn-5-en-20-one
Molecular Formula: C28H42O6
Molecular Weight: 474.63
Percent Composition: C 70.86%, H 8.92%, O 20.23%
Literature References: From root of Cynanchum caudatum Max., Asclepiadaceae: Mitsuhashi, Shimizu, Chem. Pharm. Bull. 8, 313, 318 (1960). Proposed structure: eidem, Steroids 2, 373 (1963). Revised structure: eidem, Tetrahedron 24, 4143 (1968). 13C-NMR studies: T. Yamagishi et al., Tetrahedron Lett. 1973, 3527, 3531.
Properties: Fine needles from ether + petr ether, mp 165-167°. [a]D22 -39.5° (c = 1.24 in 90% ethanol). uv max (ethanol): 218 nm (log e 4).
Melting point: mp 165-167°
Optical Rotation: [a]D22 -39.5° (c = 1.24 in 90% ethanol)
Absorption maximum: uv max (ethanol): 218 nm (log e 4)
Derivative Type: Monoacetate
Molecular Formula: C30H44O7
Molecular Weight: 516.67
Percent Composition: C 69.74%, H 8.58%, O 21.68%
Properties: Crystals from petr ether + benzene, mp 150°.
Melting point: mp 150°
Status: This monograph has been retired and is no longer subject to revision or update.
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