Cinobufotalin

Title: Cinobufotalin
CAS Registry Number: 1108-68-5
CAS Name: (3b,5b,15b,16b)-16-(Acetyloxy)-14,15-epoxy-3,5-dihydroxybufa-20,22-dienolide
Additional Names: 14,15b-epoxy-3b,5,16b-trihydroxy-5b-bufa-20,22-dienolide 16-acetate
Molecular Formula: C26H34O7
Molecular Weight: 458.54
Percent Composition: C 68.10%, H 7.47%, O 24.42%
Literature References: Isolated from the Chinese drug Ch'an Su which is prepd from Chinese toads (Bufo asiaticus = bufo gargarizans Cantor). Isoln: Kotake, Kuwada, C.A. 31, 70652 (1937); Ruckstubl, Meyer, Helv. Chim. Acta 40, 1270 (1957). Structure: Bernoulli et al., ibid. 45, 240 (1962).
Properties: Octahedrons from acetone, mp 259-262°. [a]D20 +11°. uv max: 295 nm (log e 3.72).
Melting point: mp 259-262°
Optical Rotation: [a]D20 +11°
Absorption maximum: uv max: 295 nm (log e 3.72)
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