Taraxasterol
Title: Taraxasterol
CAS Registry Number: 1059-14-9
CAS Name: (3b,18a,19a)-Urs-20(30)-en-3-ol
Additional Names: taraxast-20(30)-en-3b-ol; anthesterin; a-lactucerol; taraxasterin
Molecular Formula: C30H50O
Molecular Weight: 426.72
Percent Composition: C 84.44%, H 11.81%, O 3.75%
Literature References: A monohydroxy triterpene. Isoln from Taraxacum officinale, Wiggers, Compositae: Power, Browning, J. Chem. Soc. 101, 2411 (1912). Structure and configuration: Ames et al., ibid. 1954, 1905. Identity with anthesterin: Power, Browning ibid. 105, 1829 (1914); with a-lactucerol: Zellner, Monatsh. Chem. 47, 681 (1926).
Properties: Needles from alcohol, mp 221-222°. [a]D +96.3° (CHCl3). Very sol in alcohol, ether, petr ether; slightly sol in chloroform, benzene, carbon disulfide, acetone.
Melting point: mp 221-222°
Optical Rotation: [a]D +96.3° (CHCl3)
 
Derivative Type: Acetate
Additional Names: Lactucerin; lactucon
Molecular Formula: C32H52O2
Molecular Weight: 468.75
Percent Composition: C 81.99%, H 11.18%, O 6.83%
Properties: Hexagonal plates. mp 251-252° (from ethyl acetate + alcohol). [a]D +100.5°.
Melting point: mp 251-252° (from ethyl acetate + alcohol)
Optical Rotation: [a]D +100.5°

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