Title: Stigmastanol
CAS Registry Number: 83-45-4
CAS Name: (3b,5a)-Stigmastan-3-ol
Additional Names: dihydro-b-sitosterol; b-sitostanol; 24a-ethylcholestanol; fucostanol
Molecular Formula: C29H52O
Molecular Weight: 416.72
Percent Composition: C 83.58%, H 12.58%, O 3.84%
Literature References: Occurs along with b-sitosterol and stigmasterol. Formation from b-sitosterol: Bernstein, Wallis, J. Org. Chem. 2, 341 (1937); from b-sitostenone: Marker, Wittle, J. Am. Chem. Soc. 59, 2704 (1937). Antihypercholesteremic activity in rabbits: I. Ikeda et al., J. Nutr. Sci. Vitaminol. 27, 243 (1981).
Derivative Type: Monohydrate
Properties: Crystals, mp 138-139°. When dry mp 144-145°. [a]D20 +25° (c = 1.1 in chloroform).
Melting point: mp 138-139°; mp 144-145°
Optical Rotation: [a]D20 +25° (c = 1.1 in chloroform)
Derivative Type: Acetate
Molecular Formula: C31H54O2
Molecular Weight: 458.76
Percent Composition: C 81.16%, H 11.86%, O 6.98%
Properties: mp 137-138°. [a]D20 +14° (c = 1.8 in chloroform).
Melting point: mp 137-138°
Optical Rotation: [a]D20 +14° (c = 1.8 in chloroform)
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