Properties: Needles with 0.75 mol H2O from H2O; mp 175-176° when dried at 100°. [a]D20 -60° (c = 1.4). One gram dissolves in 55 ml water; freely sol in hot water, alcohol. Forms compds with urea, thiourea, certain amino acids.
Melting point: mp 175-176° when dried at 100°
Optical Rotation: [a]D20 -60° (c = 1.4)
Derivative Type: Tetraacetate
Percent Composition: C 55.75%, H 5.35%, O 38.90%
Properties: Needles from alc, mp 142°. [a]D20 -37° (acetone).
Melting point: mp 142°
Optical Rotation: [a]D20 -37° (acetone)
NOTE: The same formula is ascribed to
spirein, found in Spiraea camtschatica Pall. and in S. ulmaria L., Rosaceae. Emulsin hydrolyzes helicin and spirein, yielding D-glucose and salicylaldehyde.
产品链接: 618-65-5››