Properties: Needles with ½H2O from 80% alcohol, mp 220-223°. [a]D20 +53 to +56° (c = 0.9 in dioxane). Not precipitated by digitonin (in 80% alcoholic soln). Soluble in alcohol, acetone, aq alkalies. One gram dissolves in more than 100 ml of boiling benzene. Slightly sol in ether, chloroform. Insol in water, aq dil acids.
Melting point: mp 220-223°
Optical Rotation: [a]D20 +53 to +56° (c = 0.9 in dioxane)
Derivative Type: Diacetate
Percent Composition: C 74.13%, H 7.92%, O 17.95%
Properties: mp 140-142°.
Melting point: mp 140-142°
Derivative Type: 3-Benzoate
Percent Composition: C 79.75%, H 7.50%, O 12.75%
Properties: mp 156-157°; also reported as polymorphous: I, mp 63°; II, mp 153°; III, mp 158°.
Melting point: mp 156-157°; also reported as polymorphous: I, mp 63°; II, mp 153°; III, mp 158°
产品链接: 57-91-0››